/mandos/trunk

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  • Committer: teddy at recompile
  • Date: 2020-07-04 08:59:37 UTC
  • Revision ID: teddy@recompile.se-20200704085937-r495zb32nfng9lnt
In initramfs-tools boots, only use setsid when available

* initramfs-tools-script: If available, use setsid to start
  mandos-to-cryptroot-unlock.

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1
 
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
 
1
#!/usr/bin/python3 -bI
 
2
# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
 
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
 
 
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
 
 
12
#
13
13
# Everything else is
14
 
# Copyright © 2008-2014 Teddy Hogeborn
15
 
# Copyright © 2008-2014 Björn Påhlsson
16
 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
 
14
# Copyright © 2008-2019 Teddy Hogeborn
 
15
# Copyright © 2008-2019 Björn Påhlsson
 
16
#
 
17
# This file is part of Mandos.
 
18
#
 
19
# Mandos is free software: you can redistribute it and/or modify it
 
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
 
24
#     Mandos is distributed in the hope that it will be useful, but
 
25
#     WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
27
#     GNU General Public License for more details.
26
 
 
28
#
27
29
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
 
30
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
 
 
33
#
33
34
 
34
35
from __future__ import (division, absolute_import, print_function,
35
36
                        unicode_literals)
36
37
 
37
 
from future_builtins import *
 
38
try:
 
39
    from future_builtins import *
 
40
except ImportError:
 
41
    pass
38
42
 
39
 
import SocketServer as socketserver
 
43
try:
 
44
    import SocketServer as socketserver
 
45
except ImportError:
 
46
    import socketserver
40
47
import socket
41
48
import argparse
42
49
import datetime
43
50
import errno
44
 
import gnutls.crypto
45
 
import gnutls.connection
46
 
import gnutls.errors
47
 
import gnutls.library.functions
48
 
import gnutls.library.constants
49
 
import gnutls.library.types
50
 
import ConfigParser as configparser
 
51
try:
 
52
    import ConfigParser as configparser
 
53
except ImportError:
 
54
    import configparser
51
55
import sys
52
56
import re
53
57
import os
62
66
import struct
63
67
import fcntl
64
68
import functools
65
 
import cPickle as pickle
 
69
try:
 
70
    import cPickle as pickle
 
71
except ImportError:
 
72
    import pickle
66
73
import multiprocessing
67
74
import types
68
75
import binascii
69
76
import tempfile
70
77
import itertools
71
78
import collections
 
79
import codecs
 
80
import unittest
 
81
import random
 
82
import shlex
72
83
 
73
84
import dbus
74
85
import dbus.service
75
 
import gobject
76
 
import avahi
 
86
import gi
 
87
from gi.repository import GLib
77
88
from dbus.mainloop.glib import DBusGMainLoop
78
89
import ctypes
79
90
import ctypes.util
80
91
import xml.dom.minidom
81
92
import inspect
82
93
 
83
 
try:
 
94
if sys.version_info.major == 2:
 
95
    __metaclass__ = type
 
96
    str = unicode
 
97
 
 
98
# Add collections.abc.Callable if it does not exist
 
99
try:
 
100
    collections.abc.Callable
 
101
except AttributeError:
 
102
    class abc:
 
103
        Callable = collections.Callable
 
104
    collections.abc = abc
 
105
    del abc
 
106
 
 
107
# Add shlex.quote if it does not exist
 
108
try:
 
109
    shlex.quote
 
110
except AttributeError:
 
111
    shlex.quote = re.escape
 
112
 
 
113
# Show warnings by default
 
114
if not sys.warnoptions:
 
115
    import warnings
 
116
    warnings.simplefilter("default")
 
117
 
 
118
# Try to find the value of SO_BINDTODEVICE:
 
119
try:
 
120
    # This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
 
121
    # newer, and it is also the most natural place for it:
84
122
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
123
except AttributeError:
86
124
    try:
 
125
        # This is where SO_BINDTODEVICE was up to and including Python
 
126
        # 2.6, and also 3.2:
87
127
        from IN import SO_BINDTODEVICE
88
128
    except ImportError:
89
 
        SO_BINDTODEVICE = None
90
 
 
91
 
version = "1.6.4"
 
129
        # In Python 2.7 it seems to have been removed entirely.
 
130
        # Try running the C preprocessor:
 
131
        try:
 
132
            cc = subprocess.Popen(["cc", "--language=c", "-E",
 
133
                                   "/dev/stdin"],
 
134
                                  stdin=subprocess.PIPE,
 
135
                                  stdout=subprocess.PIPE)
 
136
            stdout = cc.communicate(
 
137
                "#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
 
138
            SO_BINDTODEVICE = int(stdout.splitlines()[-1])
 
139
        except (OSError, ValueError, IndexError):
 
140
            # No value found
 
141
            SO_BINDTODEVICE = None
 
142
 
 
143
if sys.version_info < (3, 2):
 
144
    configparser.Configparser = configparser.SafeConfigParser
 
145
 
 
146
version = "1.8.11"
92
147
stored_state_file = "clients.pickle"
93
148
 
94
149
logger = logging.getLogger()
 
150
logging.captureWarnings(True)   # Show warnings via the logging system
95
151
syslogger = None
96
152
 
97
153
try:
98
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
99
 
                      (ctypes.util.find_library("c"))
100
 
                      .if_nametoindex)
 
154
    if_nametoindex = ctypes.cdll.LoadLibrary(
 
155
        ctypes.util.find_library("c")).if_nametoindex
101
156
except (OSError, AttributeError):
 
157
 
102
158
    def if_nametoindex(interface):
103
159
        "Get an interface index the hard way, i.e. using fcntl()"
104
160
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
105
161
        with contextlib.closing(socket.socket()) as s:
106
162
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
 
                                struct.pack(str("16s16x"),
108
 
                                            interface))
109
 
        interface_index = struct.unpack(str("I"),
110
 
                                        ifreq[16:20])[0]
 
163
                                struct.pack(b"16s16x", interface))
 
164
        interface_index = struct.unpack("I", ifreq[16:20])[0]
111
165
        return interface_index
112
166
 
113
167
 
 
168
def copy_function(func):
 
169
    """Make a copy of a function"""
 
170
    if sys.version_info.major == 2:
 
171
        return types.FunctionType(func.func_code,
 
172
                                  func.func_globals,
 
173
                                  func.func_name,
 
174
                                  func.func_defaults,
 
175
                                  func.func_closure)
 
176
    else:
 
177
        return types.FunctionType(func.__code__,
 
178
                                  func.__globals__,
 
179
                                  func.__name__,
 
180
                                  func.__defaults__,
 
181
                                  func.__closure__)
 
182
 
 
183
 
114
184
def initlogger(debug, level=logging.WARNING):
115
185
    """init logger and add loglevel"""
116
 
    
117
 
    syslogger = (logging.handlers.SysLogHandler
118
 
                 (facility =
119
 
                  logging.handlers.SysLogHandler.LOG_DAEMON,
120
 
                  address = str("/dev/log")))
 
186
 
 
187
    global syslogger
 
188
    syslogger = (logging.handlers.SysLogHandler(
 
189
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
 
190
        address="/dev/log"))
121
191
    syslogger.setFormatter(logging.Formatter
122
192
                           ('Mandos [%(process)d]: %(levelname)s:'
123
193
                            ' %(message)s'))
124
194
    logger.addHandler(syslogger)
125
 
    
 
195
 
126
196
    if debug:
127
197
        console = logging.StreamHandler()
128
198
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
138
208
    pass
139
209
 
140
210
 
141
 
class PGPEngine(object):
 
211
class PGPEngine:
142
212
    """A simple class for OpenPGP symmetric encryption & decryption"""
 
213
 
143
214
    def __init__(self):
144
215
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
 
216
        self.gpg = "gpg"
 
217
        try:
 
218
            output = subprocess.check_output(["gpgconf"])
 
219
            for line in output.splitlines():
 
220
                name, text, path = line.split(b":")
 
221
                if name == b"gpg":
 
222
                    self.gpg = path
 
223
                    break
 
224
        except OSError as e:
 
225
            if e.errno != errno.ENOENT:
 
226
                raise
145
227
        self.gnupgargs = ['--batch',
146
 
                          '--home', self.tempdir,
 
228
                          '--homedir', self.tempdir,
147
229
                          '--force-mdc',
148
 
                          '--quiet',
149
 
                          '--no-use-agent']
150
 
    
 
230
                          '--quiet']
 
231
        # Only GPG version 1 has the --no-use-agent option.
 
232
        if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
 
233
            self.gnupgargs.append("--no-use-agent")
 
234
 
151
235
    def __enter__(self):
152
236
        return self
153
 
    
 
237
 
154
238
    def __exit__(self, exc_type, exc_value, traceback):
155
239
        self._cleanup()
156
240
        return False
157
 
    
 
241
 
158
242
    def __del__(self):
159
243
        self._cleanup()
160
 
    
 
244
 
161
245
    def _cleanup(self):
162
246
        if self.tempdir is not None:
163
247
            # Delete contents of tempdir
164
248
            for root, dirs, files in os.walk(self.tempdir,
165
 
                                             topdown = False):
 
249
                                             topdown=False):
166
250
                for filename in files:
167
251
                    os.remove(os.path.join(root, filename))
168
252
                for dirname in dirs:
170
254
            # Remove tempdir
171
255
            os.rmdir(self.tempdir)
172
256
            self.tempdir = None
173
 
    
 
257
 
174
258
    def password_encode(self, password):
175
259
        # Passphrase can not be empty and can not contain newlines or
176
260
        # NUL bytes.  So we prefix it and hex encode it.
181
265
                       .replace(b"\n", b"\\n")
182
266
                       .replace(b"\0", b"\\x00"))
183
267
        return encoded
184
 
    
 
268
 
185
269
    def encrypt(self, data, password):
186
270
        passphrase = self.password_encode(password)
187
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
188
 
                                         ) as passfile:
 
271
        with tempfile.NamedTemporaryFile(
 
272
                dir=self.tempdir) as passfile:
189
273
            passfile.write(passphrase)
190
274
            passfile.flush()
191
 
            proc = subprocess.Popen(['gpg', '--symmetric',
 
275
            proc = subprocess.Popen([self.gpg, '--symmetric',
192
276
                                     '--passphrase-file',
193
277
                                     passfile.name]
194
278
                                    + self.gnupgargs,
195
 
                                    stdin = subprocess.PIPE,
196
 
                                    stdout = subprocess.PIPE,
197
 
                                    stderr = subprocess.PIPE)
198
 
            ciphertext, err = proc.communicate(input = data)
 
279
                                    stdin=subprocess.PIPE,
 
280
                                    stdout=subprocess.PIPE,
 
281
                                    stderr=subprocess.PIPE)
 
282
            ciphertext, err = proc.communicate(input=data)
199
283
        if proc.returncode != 0:
200
284
            raise PGPError(err)
201
285
        return ciphertext
202
 
    
 
286
 
203
287
    def decrypt(self, data, password):
204
288
        passphrase = self.password_encode(password)
205
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
206
 
                                         ) as passfile:
 
289
        with tempfile.NamedTemporaryFile(
 
290
                dir=self.tempdir) as passfile:
207
291
            passfile.write(passphrase)
208
292
            passfile.flush()
209
 
            proc = subprocess.Popen(['gpg', '--decrypt',
 
293
            proc = subprocess.Popen([self.gpg, '--decrypt',
210
294
                                     '--passphrase-file',
211
295
                                     passfile.name]
212
296
                                    + self.gnupgargs,
213
 
                                    stdin = subprocess.PIPE,
214
 
                                    stdout = subprocess.PIPE,
215
 
                                    stderr = subprocess.PIPE)
216
 
            decrypted_plaintext, err = proc.communicate(input
217
 
                                                        = data)
 
297
                                    stdin=subprocess.PIPE,
 
298
                                    stdout=subprocess.PIPE,
 
299
                                    stderr=subprocess.PIPE)
 
300
            decrypted_plaintext, err = proc.communicate(input=data)
218
301
        if proc.returncode != 0:
219
302
            raise PGPError(err)
220
303
        return decrypted_plaintext
221
304
 
222
305
 
 
306
# Pretend that we have an Avahi module
 
307
class avahi:
 
308
    """This isn't so much a class as it is a module-like namespace."""
 
309
    IF_UNSPEC = -1               # avahi-common/address.h
 
310
    PROTO_UNSPEC = -1            # avahi-common/address.h
 
311
    PROTO_INET = 0               # avahi-common/address.h
 
312
    PROTO_INET6 = 1              # avahi-common/address.h
 
313
    DBUS_NAME = "org.freedesktop.Avahi"
 
314
    DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
 
315
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
 
316
    DBUS_PATH_SERVER = "/"
 
317
 
 
318
    @staticmethod
 
319
    def string_array_to_txt_array(t):
 
320
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
 
321
                           for s in t), signature="ay")
 
322
    ENTRY_GROUP_ESTABLISHED = 2  # avahi-common/defs.h
 
323
    ENTRY_GROUP_COLLISION = 3    # avahi-common/defs.h
 
324
    ENTRY_GROUP_FAILURE = 4      # avahi-common/defs.h
 
325
    SERVER_INVALID = 0           # avahi-common/defs.h
 
326
    SERVER_REGISTERING = 1       # avahi-common/defs.h
 
327
    SERVER_RUNNING = 2           # avahi-common/defs.h
 
328
    SERVER_COLLISION = 3         # avahi-common/defs.h
 
329
    SERVER_FAILURE = 4           # avahi-common/defs.h
 
330
 
 
331
 
223
332
class AvahiError(Exception):
224
333
    def __init__(self, value, *args, **kwargs):
225
334
        self.value = value
226
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
227
 
    def __unicode__(self):
228
 
        return unicode(repr(self.value))
 
335
        return super(AvahiError, self).__init__(value, *args,
 
336
                                                **kwargs)
 
337
 
229
338
 
230
339
class AvahiServiceError(AvahiError):
231
340
    pass
232
341
 
 
342
 
233
343
class AvahiGroupError(AvahiError):
234
344
    pass
235
345
 
236
346
 
237
 
class AvahiService(object):
 
347
class AvahiService:
238
348
    """An Avahi (Zeroconf) service.
239
 
    
 
349
 
240
350
    Attributes:
241
351
    interface: integer; avahi.IF_UNSPEC or an interface index.
242
352
               Used to optionally bind to the specified interface.
254
364
    server: D-Bus Server
255
365
    bus: dbus.SystemBus()
256
366
    """
257
 
    
258
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
259
 
                 servicetype = None, port = None, TXT = None,
260
 
                 domain = "", host = "", max_renames = 32768,
261
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
367
 
 
368
    def __init__(self,
 
369
                 interface=avahi.IF_UNSPEC,
 
370
                 name=None,
 
371
                 servicetype=None,
 
372
                 port=None,
 
373
                 TXT=None,
 
374
                 domain="",
 
375
                 host="",
 
376
                 max_renames=32768,
 
377
                 protocol=avahi.PROTO_UNSPEC,
 
378
                 bus=None):
262
379
        self.interface = interface
263
380
        self.name = name
264
381
        self.type = servicetype
273
390
        self.server = None
274
391
        self.bus = bus
275
392
        self.entry_group_state_changed_match = None
276
 
    
277
 
    def rename(self):
 
393
 
 
394
    def rename(self, remove=True):
278
395
        """Derived from the Avahi example code"""
279
396
        if self.rename_count >= self.max_renames:
280
397
            logger.critical("No suitable Zeroconf service name found"
281
398
                            " after %i retries, exiting.",
282
399
                            self.rename_count)
283
400
            raise AvahiServiceError("Too many renames")
284
 
        self.name = unicode(self.server
285
 
                            .GetAlternativeServiceName(self.name))
 
401
        self.name = str(
 
402
            self.server.GetAlternativeServiceName(self.name))
 
403
        self.rename_count += 1
286
404
        logger.info("Changing Zeroconf service name to %r ...",
287
405
                    self.name)
288
 
        self.remove()
 
406
        if remove:
 
407
            self.remove()
289
408
        try:
290
409
            self.add()
291
410
        except dbus.exceptions.DBusException as error:
292
 
            logger.critical("D-Bus Exception", exc_info=error)
293
 
            self.cleanup()
294
 
            os._exit(1)
295
 
        self.rename_count += 1
296
 
    
 
411
            if (error.get_dbus_name()
 
412
                == "org.freedesktop.Avahi.CollisionError"):
 
413
                logger.info("Local Zeroconf service name collision.")
 
414
                return self.rename(remove=False)
 
415
            else:
 
416
                logger.critical("D-Bus Exception", exc_info=error)
 
417
                self.cleanup()
 
418
                os._exit(1)
 
419
 
297
420
    def remove(self):
298
421
        """Derived from the Avahi example code"""
299
422
        if self.entry_group_state_changed_match is not None:
301
424
            self.entry_group_state_changed_match = None
302
425
        if self.group is not None:
303
426
            self.group.Reset()
304
 
    
 
427
 
305
428
    def add(self):
306
429
        """Derived from the Avahi example code"""
307
430
        self.remove()
324
447
            dbus.UInt16(self.port),
325
448
            avahi.string_array_to_txt_array(self.TXT))
326
449
        self.group.Commit()
327
 
    
 
450
 
328
451
    def entry_group_state_changed(self, state, error):
329
452
        """Derived from the Avahi example code"""
330
453
        logger.debug("Avahi entry group state change: %i", state)
331
 
        
 
454
 
332
455
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
333
456
            logger.debug("Zeroconf service established.")
334
457
        elif state == avahi.ENTRY_GROUP_COLLISION:
336
459
            self.rename()
337
460
        elif state == avahi.ENTRY_GROUP_FAILURE:
338
461
            logger.critical("Avahi: Error in group state changed %s",
339
 
                            unicode(error))
340
 
            raise AvahiGroupError("State changed: {0!s}"
341
 
                                  .format(error))
342
 
    
 
462
                            str(error))
 
463
            raise AvahiGroupError("State changed: {!s}".format(error))
 
464
 
343
465
    def cleanup(self):
344
466
        """Derived from the Avahi example code"""
345
467
        if self.group is not None:
350
472
                pass
351
473
            self.group = None
352
474
        self.remove()
353
 
    
 
475
 
354
476
    def server_state_changed(self, state, error=None):
355
477
        """Derived from the Avahi example code"""
356
478
        logger.debug("Avahi server state change: %i", state)
357
 
        bad_states = { avahi.SERVER_INVALID:
358
 
                           "Zeroconf server invalid",
359
 
                       avahi.SERVER_REGISTERING: None,
360
 
                       avahi.SERVER_COLLISION:
361
 
                           "Zeroconf server name collision",
362
 
                       avahi.SERVER_FAILURE:
363
 
                           "Zeroconf server failure" }
 
479
        bad_states = {
 
480
            avahi.SERVER_INVALID: "Zeroconf server invalid",
 
481
            avahi.SERVER_REGISTERING: None,
 
482
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
 
483
            avahi.SERVER_FAILURE: "Zeroconf server failure",
 
484
        }
364
485
        if state in bad_states:
365
486
            if bad_states[state] is not None:
366
487
                if error is None:
369
490
                    logger.error(bad_states[state] + ": %r", error)
370
491
            self.cleanup()
371
492
        elif state == avahi.SERVER_RUNNING:
372
 
            self.add()
 
493
            try:
 
494
                self.add()
 
495
            except dbus.exceptions.DBusException as error:
 
496
                if (error.get_dbus_name()
 
497
                    == "org.freedesktop.Avahi.CollisionError"):
 
498
                    logger.info("Local Zeroconf service name"
 
499
                                " collision.")
 
500
                    return self.rename(remove=False)
 
501
                else:
 
502
                    logger.critical("D-Bus Exception", exc_info=error)
 
503
                    self.cleanup()
 
504
                    os._exit(1)
373
505
        else:
374
506
            if error is None:
375
507
                logger.debug("Unknown state: %r", state)
376
508
            else:
377
509
                logger.debug("Unknown state: %r: %r", state, error)
378
 
    
 
510
 
379
511
    def activate(self):
380
512
        """Derived from the Avahi example code"""
381
513
        if self.server is None:
385
517
                                    follow_name_owner_changes=True),
386
518
                avahi.DBUS_INTERFACE_SERVER)
387
519
        self.server.connect_to_signal("StateChanged",
388
 
                                 self.server_state_changed)
 
520
                                      self.server_state_changed)
389
521
        self.server_state_changed(self.server.GetState())
390
522
 
391
523
 
392
524
class AvahiServiceToSyslog(AvahiService):
393
 
    def rename(self):
 
525
    def rename(self, *args, **kwargs):
394
526
        """Add the new name to the syslog messages"""
395
 
        ret = AvahiService.rename(self)
396
 
        syslogger.setFormatter(logging.Formatter
397
 
                               ('Mandos ({0}) [%(process)d]:'
398
 
                                ' %(levelname)s: %(message)s'
399
 
                                .format(self.name)))
 
527
        ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
 
528
        syslogger.setFormatter(logging.Formatter(
 
529
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
 
530
            .format(self.name)))
400
531
        return ret
401
532
 
402
533
 
403
 
def timedelta_to_milliseconds(td):
404
 
    "Convert a datetime.timedelta() to milliseconds"
405
 
    return ((td.days * 24 * 60 * 60 * 1000)
406
 
            + (td.seconds * 1000)
407
 
            + (td.microseconds // 1000))
408
 
 
409
 
 
410
 
class Client(object):
 
534
# Pretend that we have a GnuTLS module
 
535
class gnutls:
 
536
    """This isn't so much a class as it is a module-like namespace."""
 
537
 
 
538
    library = ctypes.util.find_library("gnutls")
 
539
    if library is None:
 
540
        library = ctypes.util.find_library("gnutls-deb0")
 
541
    _library = ctypes.cdll.LoadLibrary(library)
 
542
    del library
 
543
 
 
544
    # Unless otherwise indicated, the constants and types below are
 
545
    # all from the gnutls/gnutls.h C header file.
 
546
 
 
547
    # Constants
 
548
    E_SUCCESS = 0
 
549
    E_INTERRUPTED = -52
 
550
    E_AGAIN = -28
 
551
    CRT_OPENPGP = 2
 
552
    CRT_RAWPK = 3
 
553
    CLIENT = 2
 
554
    SHUT_RDWR = 0
 
555
    CRD_CERTIFICATE = 1
 
556
    E_NO_CERTIFICATE_FOUND = -49
 
557
    X509_FMT_DER = 0
 
558
    NO_TICKETS = 1<<10
 
559
    ENABLE_RAWPK = 1<<18
 
560
    CTYPE_PEERS = 3
 
561
    KEYID_USE_SHA256 = 1        # gnutls/x509.h
 
562
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
 
563
 
 
564
    # Types
 
565
    class session_int(ctypes.Structure):
 
566
        _fields_ = []
 
567
    session_t = ctypes.POINTER(session_int)
 
568
 
 
569
    class certificate_credentials_st(ctypes.Structure):
 
570
        _fields_ = []
 
571
    certificate_credentials_t = ctypes.POINTER(
 
572
        certificate_credentials_st)
 
573
    certificate_type_t = ctypes.c_int
 
574
 
 
575
    class datum_t(ctypes.Structure):
 
576
        _fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
 
577
                    ('size', ctypes.c_uint)]
 
578
 
 
579
    class openpgp_crt_int(ctypes.Structure):
 
580
        _fields_ = []
 
581
    openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
 
582
    openpgp_crt_fmt_t = ctypes.c_int  # gnutls/openpgp.h
 
583
    log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
 
584
    credentials_type_t = ctypes.c_int
 
585
    transport_ptr_t = ctypes.c_void_p
 
586
    close_request_t = ctypes.c_int
 
587
 
 
588
    # Exceptions
 
589
    class Error(Exception):
 
590
        def __init__(self, message=None, code=None, args=()):
 
591
            # Default usage is by a message string, but if a return
 
592
            # code is passed, convert it to a string with
 
593
            # gnutls.strerror()
 
594
            self.code = code
 
595
            if message is None and code is not None:
 
596
                message = gnutls.strerror(code)
 
597
            return super(gnutls.Error, self).__init__(
 
598
                message, *args)
 
599
 
 
600
    class CertificateSecurityError(Error):
 
601
        pass
 
602
 
 
603
    # Classes
 
604
    class Credentials:
 
605
        def __init__(self):
 
606
            self._c_object = gnutls.certificate_credentials_t()
 
607
            gnutls.certificate_allocate_credentials(
 
608
                ctypes.byref(self._c_object))
 
609
            self.type = gnutls.CRD_CERTIFICATE
 
610
 
 
611
        def __del__(self):
 
612
            gnutls.certificate_free_credentials(self._c_object)
 
613
 
 
614
    class ClientSession:
 
615
        def __init__(self, socket, credentials=None):
 
616
            self._c_object = gnutls.session_t()
 
617
            gnutls_flags = gnutls.CLIENT
 
618
            if gnutls.check_version(b"3.5.6"):
 
619
                gnutls_flags |= gnutls.NO_TICKETS
 
620
            if gnutls.has_rawpk:
 
621
                gnutls_flags |= gnutls.ENABLE_RAWPK
 
622
            gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
 
623
            del gnutls_flags
 
624
            gnutls.set_default_priority(self._c_object)
 
625
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
 
626
            gnutls.handshake_set_private_extensions(self._c_object,
 
627
                                                    True)
 
628
            self.socket = socket
 
629
            if credentials is None:
 
630
                credentials = gnutls.Credentials()
 
631
            gnutls.credentials_set(self._c_object, credentials.type,
 
632
                                   ctypes.cast(credentials._c_object,
 
633
                                               ctypes.c_void_p))
 
634
            self.credentials = credentials
 
635
 
 
636
        def __del__(self):
 
637
            gnutls.deinit(self._c_object)
 
638
 
 
639
        def handshake(self):
 
640
            return gnutls.handshake(self._c_object)
 
641
 
 
642
        def send(self, data):
 
643
            data = bytes(data)
 
644
            data_len = len(data)
 
645
            while data_len > 0:
 
646
                data_len -= gnutls.record_send(self._c_object,
 
647
                                               data[-data_len:],
 
648
                                               data_len)
 
649
 
 
650
        def bye(self):
 
651
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
 
652
 
 
653
    # Error handling functions
 
654
    def _error_code(result):
 
655
        """A function to raise exceptions on errors, suitable
 
656
        for the 'restype' attribute on ctypes functions"""
 
657
        if result >= 0:
 
658
            return result
 
659
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
 
660
            raise gnutls.CertificateSecurityError(code=result)
 
661
        raise gnutls.Error(code=result)
 
662
 
 
663
    def _retry_on_error(result, func, arguments):
 
664
        """A function to retry on some errors, suitable
 
665
        for the 'errcheck' attribute on ctypes functions"""
 
666
        while result < 0:
 
667
            if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
 
668
                return _error_code(result)
 
669
            result = func(*arguments)
 
670
        return result
 
671
 
 
672
    # Unless otherwise indicated, the function declarations below are
 
673
    # all from the gnutls/gnutls.h C header file.
 
674
 
 
675
    # Functions
 
676
    priority_set_direct = _library.gnutls_priority_set_direct
 
677
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
 
678
                                    ctypes.POINTER(ctypes.c_char_p)]
 
679
    priority_set_direct.restype = _error_code
 
680
 
 
681
    init = _library.gnutls_init
 
682
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
 
683
    init.restype = _error_code
 
684
 
 
685
    set_default_priority = _library.gnutls_set_default_priority
 
686
    set_default_priority.argtypes = [session_t]
 
687
    set_default_priority.restype = _error_code
 
688
 
 
689
    record_send = _library.gnutls_record_send
 
690
    record_send.argtypes = [session_t, ctypes.c_void_p,
 
691
                            ctypes.c_size_t]
 
692
    record_send.restype = ctypes.c_ssize_t
 
693
    record_send.errcheck = _retry_on_error
 
694
 
 
695
    certificate_allocate_credentials = (
 
696
        _library.gnutls_certificate_allocate_credentials)
 
697
    certificate_allocate_credentials.argtypes = [
 
698
        ctypes.POINTER(certificate_credentials_t)]
 
699
    certificate_allocate_credentials.restype = _error_code
 
700
 
 
701
    certificate_free_credentials = (
 
702
        _library.gnutls_certificate_free_credentials)
 
703
    certificate_free_credentials.argtypes = [
 
704
        certificate_credentials_t]
 
705
    certificate_free_credentials.restype = None
 
706
 
 
707
    handshake_set_private_extensions = (
 
708
        _library.gnutls_handshake_set_private_extensions)
 
709
    handshake_set_private_extensions.argtypes = [session_t,
 
710
                                                 ctypes.c_int]
 
711
    handshake_set_private_extensions.restype = None
 
712
 
 
713
    credentials_set = _library.gnutls_credentials_set
 
714
    credentials_set.argtypes = [session_t, credentials_type_t,
 
715
                                ctypes.c_void_p]
 
716
    credentials_set.restype = _error_code
 
717
 
 
718
    strerror = _library.gnutls_strerror
 
719
    strerror.argtypes = [ctypes.c_int]
 
720
    strerror.restype = ctypes.c_char_p
 
721
 
 
722
    certificate_type_get = _library.gnutls_certificate_type_get
 
723
    certificate_type_get.argtypes = [session_t]
 
724
    certificate_type_get.restype = _error_code
 
725
 
 
726
    certificate_get_peers = _library.gnutls_certificate_get_peers
 
727
    certificate_get_peers.argtypes = [session_t,
 
728
                                      ctypes.POINTER(ctypes.c_uint)]
 
729
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
 
730
 
 
731
    global_set_log_level = _library.gnutls_global_set_log_level
 
732
    global_set_log_level.argtypes = [ctypes.c_int]
 
733
    global_set_log_level.restype = None
 
734
 
 
735
    global_set_log_function = _library.gnutls_global_set_log_function
 
736
    global_set_log_function.argtypes = [log_func]
 
737
    global_set_log_function.restype = None
 
738
 
 
739
    deinit = _library.gnutls_deinit
 
740
    deinit.argtypes = [session_t]
 
741
    deinit.restype = None
 
742
 
 
743
    handshake = _library.gnutls_handshake
 
744
    handshake.argtypes = [session_t]
 
745
    handshake.restype = _error_code
 
746
    handshake.errcheck = _retry_on_error
 
747
 
 
748
    transport_set_ptr = _library.gnutls_transport_set_ptr
 
749
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
 
750
    transport_set_ptr.restype = None
 
751
 
 
752
    bye = _library.gnutls_bye
 
753
    bye.argtypes = [session_t, close_request_t]
 
754
    bye.restype = _error_code
 
755
    bye.errcheck = _retry_on_error
 
756
 
 
757
    check_version = _library.gnutls_check_version
 
758
    check_version.argtypes = [ctypes.c_char_p]
 
759
    check_version.restype = ctypes.c_char_p
 
760
 
 
761
    _need_version = b"3.3.0"
 
762
    if check_version(_need_version) is None:
 
763
        raise self.Error("Needs GnuTLS {} or later"
 
764
                         .format(_need_version))
 
765
 
 
766
    _tls_rawpk_version = b"3.6.6"
 
767
    has_rawpk = bool(check_version(_tls_rawpk_version))
 
768
 
 
769
    if has_rawpk:
 
770
        # Types
 
771
        class pubkey_st(ctypes.Structure):
 
772
            _fields = []
 
773
        pubkey_t = ctypes.POINTER(pubkey_st)
 
774
 
 
775
        x509_crt_fmt_t = ctypes.c_int
 
776
 
 
777
        # All the function declarations below are from gnutls/abstract.h
 
778
        pubkey_init = _library.gnutls_pubkey_init
 
779
        pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
 
780
        pubkey_init.restype = _error_code
 
781
 
 
782
        pubkey_import = _library.gnutls_pubkey_import
 
783
        pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
 
784
                                  x509_crt_fmt_t]
 
785
        pubkey_import.restype = _error_code
 
786
 
 
787
        pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
 
788
        pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
 
789
                                      ctypes.POINTER(ctypes.c_ubyte),
 
790
                                      ctypes.POINTER(ctypes.c_size_t)]
 
791
        pubkey_get_key_id.restype = _error_code
 
792
 
 
793
        pubkey_deinit = _library.gnutls_pubkey_deinit
 
794
        pubkey_deinit.argtypes = [pubkey_t]
 
795
        pubkey_deinit.restype = None
 
796
    else:
 
797
        # All the function declarations below are from gnutls/openpgp.h
 
798
 
 
799
        openpgp_crt_init = _library.gnutls_openpgp_crt_init
 
800
        openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
 
801
        openpgp_crt_init.restype = _error_code
 
802
 
 
803
        openpgp_crt_import = _library.gnutls_openpgp_crt_import
 
804
        openpgp_crt_import.argtypes = [openpgp_crt_t,
 
805
                                       ctypes.POINTER(datum_t),
 
806
                                       openpgp_crt_fmt_t]
 
807
        openpgp_crt_import.restype = _error_code
 
808
 
 
809
        openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
 
810
        openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
 
811
                                            ctypes.POINTER(ctypes.c_uint)]
 
812
        openpgp_crt_verify_self.restype = _error_code
 
813
 
 
814
        openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
 
815
        openpgp_crt_deinit.argtypes = [openpgp_crt_t]
 
816
        openpgp_crt_deinit.restype = None
 
817
 
 
818
        openpgp_crt_get_fingerprint = (
 
819
            _library.gnutls_openpgp_crt_get_fingerprint)
 
820
        openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
 
821
                                                ctypes.c_void_p,
 
822
                                                ctypes.POINTER(
 
823
                                                    ctypes.c_size_t)]
 
824
        openpgp_crt_get_fingerprint.restype = _error_code
 
825
 
 
826
    if check_version(b"3.6.4"):
 
827
        certificate_type_get2 = _library.gnutls_certificate_type_get2
 
828
        certificate_type_get2.argtypes = [session_t, ctypes.c_int]
 
829
        certificate_type_get2.restype = _error_code
 
830
 
 
831
    # Remove non-public functions
 
832
    del _error_code, _retry_on_error
 
833
 
 
834
 
 
835
def call_pipe(connection,       # : multiprocessing.Connection
 
836
              func, *args, **kwargs):
 
837
    """This function is meant to be called by multiprocessing.Process
 
838
 
 
839
    This function runs func(*args, **kwargs), and writes the resulting
 
840
    return value on the provided multiprocessing.Connection.
 
841
    """
 
842
    connection.send(func(*args, **kwargs))
 
843
    connection.close()
 
844
 
 
845
 
 
846
class Client:
411
847
    """A representation of a client host served by this server.
412
 
    
 
848
 
413
849
    Attributes:
414
850
    approved:   bool(); 'None' if not yet approved/disapproved
415
851
    approval_delay: datetime.timedelta(); Time to wait for approval
416
852
    approval_duration: datetime.timedelta(); Duration of one approval
417
 
    checker:    subprocess.Popen(); a running checker process used
418
 
                                    to see if the client lives.
419
 
                                    'None' if no process is running.
420
 
    checker_callback_tag: a gobject event source tag, or None
 
853
    checker: multiprocessing.Process(); a running checker process used
 
854
             to see if the client lives. 'None' if no process is
 
855
             running.
 
856
    checker_callback_tag: a GLib event source tag, or None
421
857
    checker_command: string; External command which is run to check
422
858
                     if client lives.  %() expansions are done at
423
859
                     runtime with vars(self) as dict, so that for
424
860
                     instance %(name)s can be used in the command.
425
 
    checker_initiator_tag: a gobject event source tag, or None
 
861
    checker_initiator_tag: a GLib event source tag, or None
426
862
    created:    datetime.datetime(); (UTC) object creation
427
863
    client_structure: Object describing what attributes a client has
428
864
                      and is used for storing the client at exit
429
865
    current_checker_command: string; current running checker_command
430
 
    disable_initiator_tag: a gobject event source tag, or None
 
866
    disable_initiator_tag: a GLib event source tag, or None
431
867
    enabled:    bool()
432
868
    fingerprint: string (40 or 32 hexadecimal digits); used to
433
 
                 uniquely identify the client
 
869
                 uniquely identify an OpenPGP client
 
870
    key_id: string (64 hexadecimal digits); used to uniquely identify
 
871
            a client using raw public keys
434
872
    host:       string; available for use by the checker command
435
873
    interval:   datetime.timedelta(); How often to start a new checker
436
874
    last_approval_request: datetime.datetime(); (UTC) or None
438
876
    last_checker_status: integer between 0 and 255 reflecting exit
439
877
                         status of last checker. -1 reflects crashed
440
878
                         checker, -2 means no checker completed yet.
 
879
    last_checker_signal: The signal which killed the last checker, if
 
880
                         last_checker_status is -1
441
881
    last_enabled: datetime.datetime(); (UTC) or None
442
882
    name:       string; from the config file, used in log messages and
443
883
                        D-Bus identifiers
450
890
                disabled, or None
451
891
    server_settings: The server_settings dict from main()
452
892
    """
453
 
    
 
893
 
454
894
    runtime_expansions = ("approval_delay", "approval_duration",
455
 
                          "created", "enabled", "expires",
 
895
                          "created", "enabled", "expires", "key_id",
456
896
                          "fingerprint", "host", "interval",
457
897
                          "last_approval_request", "last_checked_ok",
458
898
                          "last_enabled", "name", "timeout")
459
 
    client_defaults = { "timeout": "PT5M",
460
 
                        "extended_timeout": "PT15M",
461
 
                        "interval": "PT2M",
462
 
                        "checker": "fping -q -- %%(host)s",
463
 
                        "host": "",
464
 
                        "approval_delay": "PT0S",
465
 
                        "approval_duration": "PT1S",
466
 
                        "approved_by_default": "True",
467
 
                        "enabled": "True",
468
 
                        }
469
 
    
470
 
    def timeout_milliseconds(self):
471
 
        "Return the 'timeout' attribute in milliseconds"
472
 
        return timedelta_to_milliseconds(self.timeout)
473
 
    
474
 
    def extended_timeout_milliseconds(self):
475
 
        "Return the 'extended_timeout' attribute in milliseconds"
476
 
        return timedelta_to_milliseconds(self.extended_timeout)
477
 
    
478
 
    def interval_milliseconds(self):
479
 
        "Return the 'interval' attribute in milliseconds"
480
 
        return timedelta_to_milliseconds(self.interval)
481
 
    
482
 
    def approval_delay_milliseconds(self):
483
 
        return timedelta_to_milliseconds(self.approval_delay)
484
 
    
 
899
    client_defaults = {
 
900
        "timeout": "PT5M",
 
901
        "extended_timeout": "PT15M",
 
902
        "interval": "PT2M",
 
903
        "checker": "fping -q -- %%(host)s",
 
904
        "host": "",
 
905
        "approval_delay": "PT0S",
 
906
        "approval_duration": "PT1S",
 
907
        "approved_by_default": "True",
 
908
        "enabled": "True",
 
909
    }
 
910
 
485
911
    @staticmethod
486
912
    def config_parser(config):
487
913
        """Construct a new dict of client settings of this form:
494
920
        for client_name in config.sections():
495
921
            section = dict(config.items(client_name))
496
922
            client = settings[client_name] = {}
497
 
            
 
923
 
498
924
            client["host"] = section["host"]
499
925
            # Reformat values from string types to Python types
500
926
            client["approved_by_default"] = config.getboolean(
501
927
                client_name, "approved_by_default")
502
928
            client["enabled"] = config.getboolean(client_name,
503
929
                                                  "enabled")
504
 
            
 
930
 
 
931
            # Uppercase and remove spaces from key_id and fingerprint
 
932
            # for later comparison purposes with return value from the
 
933
            # key_id() and fingerprint() functions
 
934
            client["key_id"] = (section.get("key_id", "").upper()
 
935
                                .replace(" ", ""))
505
936
            client["fingerprint"] = (section["fingerprint"].upper()
506
937
                                     .replace(" ", ""))
507
938
            if "secret" in section:
508
 
                client["secret"] = section["secret"].decode("base64")
 
939
                client["secret"] = codecs.decode(section["secret"]
 
940
                                                 .encode("utf-8"),
 
941
                                                 "base64")
509
942
            elif "secfile" in section:
510
943
                with open(os.path.expanduser(os.path.expandvars
511
944
                                             (section["secfile"])),
512
945
                          "rb") as secfile:
513
946
                    client["secret"] = secfile.read()
514
947
            else:
515
 
                raise TypeError("No secret or secfile for section {0}"
 
948
                raise TypeError("No secret or secfile for section {}"
516
949
                                .format(section))
517
950
            client["timeout"] = string_to_delta(section["timeout"])
518
951
            client["extended_timeout"] = string_to_delta(
526
959
            client["last_approval_request"] = None
527
960
            client["last_checked_ok"] = None
528
961
            client["last_checker_status"] = -2
529
 
        
 
962
 
530
963
        return settings
531
 
    
532
 
    def __init__(self, settings, name = None, server_settings=None):
 
964
 
 
965
    def __init__(self, settings, name=None, server_settings=None):
533
966
        self.name = name
534
967
        if server_settings is None:
535
968
            server_settings = {}
536
969
        self.server_settings = server_settings
537
970
        # adding all client settings
538
 
        for setting, value in settings.iteritems():
 
971
        for setting, value in settings.items():
539
972
            setattr(self, setting, value)
540
 
        
 
973
 
541
974
        if self.enabled:
542
975
            if not hasattr(self, "last_enabled"):
543
976
                self.last_enabled = datetime.datetime.utcnow()
547
980
        else:
548
981
            self.last_enabled = None
549
982
            self.expires = None
550
 
        
 
983
 
551
984
        logger.debug("Creating client %r", self.name)
552
 
        # Uppercase and remove spaces from fingerprint for later
553
 
        # comparison purposes with return value from the fingerprint()
554
 
        # function
 
985
        logger.debug("  Key ID: %s", self.key_id)
555
986
        logger.debug("  Fingerprint: %s", self.fingerprint)
556
987
        self.created = settings.get("created",
557
988
                                    datetime.datetime.utcnow())
558
 
        
 
989
 
559
990
        # attributes specific for this server instance
560
991
        self.checker = None
561
992
        self.checker_initiator_tag = None
564
995
        self.current_checker_command = None
565
996
        self.approved = None
566
997
        self.approvals_pending = 0
567
 
        self.changedstate = (multiprocessing_manager
568
 
                             .Condition(multiprocessing_manager
569
 
                                        .Lock()))
570
 
        self.client_structure = [attr for attr in
571
 
                                 self.__dict__.iterkeys()
 
998
        self.changedstate = multiprocessing_manager.Condition(
 
999
            multiprocessing_manager.Lock())
 
1000
        self.client_structure = [attr
 
1001
                                 for attr in self.__dict__.keys()
572
1002
                                 if not attr.startswith("_")]
573
1003
        self.client_structure.append("client_structure")
574
 
        
575
 
        for name, t in inspect.getmembers(type(self),
576
 
                                          lambda obj:
577
 
                                              isinstance(obj,
578
 
                                                         property)):
 
1004
 
 
1005
        for name, t in inspect.getmembers(
 
1006
                type(self), lambda obj: isinstance(obj, property)):
579
1007
            if not name.startswith("_"):
580
1008
                self.client_structure.append(name)
581
 
    
 
1009
 
582
1010
    # Send notice to process children that client state has changed
583
1011
    def send_changedstate(self):
584
1012
        with self.changedstate:
585
1013
            self.changedstate.notify_all()
586
 
    
 
1014
 
587
1015
    def enable(self):
588
1016
        """Start this client's checker and timeout hooks"""
589
1017
        if getattr(self, "enabled", False):
594
1022
        self.last_enabled = datetime.datetime.utcnow()
595
1023
        self.init_checker()
596
1024
        self.send_changedstate()
597
 
    
 
1025
 
598
1026
    def disable(self, quiet=True):
599
1027
        """Disable this client."""
600
1028
        if not getattr(self, "enabled", False):
602
1030
        if not quiet:
603
1031
            logger.info("Disabling client %s", self.name)
604
1032
        if getattr(self, "disable_initiator_tag", None) is not None:
605
 
            gobject.source_remove(self.disable_initiator_tag)
 
1033
            GLib.source_remove(self.disable_initiator_tag)
606
1034
            self.disable_initiator_tag = None
607
1035
        self.expires = None
608
1036
        if getattr(self, "checker_initiator_tag", None) is not None:
609
 
            gobject.source_remove(self.checker_initiator_tag)
 
1037
            GLib.source_remove(self.checker_initiator_tag)
610
1038
            self.checker_initiator_tag = None
611
1039
        self.stop_checker()
612
1040
        self.enabled = False
613
1041
        if not quiet:
614
1042
            self.send_changedstate()
615
 
        # Do not run this again if called by a gobject.timeout_add
 
1043
        # Do not run this again if called by a GLib.timeout_add
616
1044
        return False
617
 
    
 
1045
 
618
1046
    def __del__(self):
619
1047
        self.disable()
620
 
    
 
1048
 
621
1049
    def init_checker(self):
622
1050
        # Schedule a new checker to be started an 'interval' from now,
623
1051
        # and every interval from then on.
624
1052
        if self.checker_initiator_tag is not None:
625
 
            gobject.source_remove(self.checker_initiator_tag)
626
 
        self.checker_initiator_tag = (gobject.timeout_add
627
 
                                      (self.interval_milliseconds(),
628
 
                                       self.start_checker))
 
1053
            GLib.source_remove(self.checker_initiator_tag)
 
1054
        self.checker_initiator_tag = GLib.timeout_add(
 
1055
            random.randrange(int(self.interval.total_seconds() * 1000
 
1056
                                 + 1)),
 
1057
            self.start_checker)
629
1058
        # Schedule a disable() when 'timeout' has passed
630
1059
        if self.disable_initiator_tag is not None:
631
 
            gobject.source_remove(self.disable_initiator_tag)
632
 
        self.disable_initiator_tag = (gobject.timeout_add
633
 
                                   (self.timeout_milliseconds(),
634
 
                                    self.disable))
 
1060
            GLib.source_remove(self.disable_initiator_tag)
 
1061
        self.disable_initiator_tag = GLib.timeout_add(
 
1062
            int(self.timeout.total_seconds() * 1000), self.disable)
635
1063
        # Also start a new checker *right now*.
636
1064
        self.start_checker()
637
 
    
638
 
    def checker_callback(self, pid, condition, command):
 
1065
 
 
1066
    def checker_callback(self, source, condition, connection,
 
1067
                         command):
639
1068
        """The checker has completed, so take appropriate actions."""
 
1069
        # Read return code from connection (see call_pipe)
 
1070
        returncode = connection.recv()
 
1071
        connection.close()
 
1072
        if self.checker is not None:
 
1073
            self.checker.join()
640
1074
        self.checker_callback_tag = None
641
1075
        self.checker = None
642
 
        if os.WIFEXITED(condition):
643
 
            self.last_checker_status = os.WEXITSTATUS(condition)
 
1076
 
 
1077
        if returncode >= 0:
 
1078
            self.last_checker_status = returncode
 
1079
            self.last_checker_signal = None
644
1080
            if self.last_checker_status == 0:
645
1081
                logger.info("Checker for %(name)s succeeded",
646
1082
                            vars(self))
647
1083
                self.checked_ok()
648
1084
            else:
649
 
                logger.info("Checker for %(name)s failed",
650
 
                            vars(self))
 
1085
                logger.info("Checker for %(name)s failed", vars(self))
651
1086
        else:
652
1087
            self.last_checker_status = -1
 
1088
            self.last_checker_signal = -returncode
653
1089
            logger.warning("Checker for %(name)s crashed?",
654
1090
                           vars(self))
655
 
    
 
1091
        return False
 
1092
 
656
1093
    def checked_ok(self):
657
1094
        """Assert that the client has been seen, alive and well."""
658
1095
        self.last_checked_ok = datetime.datetime.utcnow()
659
1096
        self.last_checker_status = 0
 
1097
        self.last_checker_signal = None
660
1098
        self.bump_timeout()
661
 
    
 
1099
 
662
1100
    def bump_timeout(self, timeout=None):
663
1101
        """Bump up the timeout for this client."""
664
1102
        if timeout is None:
665
1103
            timeout = self.timeout
666
1104
        if self.disable_initiator_tag is not None:
667
 
            gobject.source_remove(self.disable_initiator_tag)
 
1105
            GLib.source_remove(self.disable_initiator_tag)
668
1106
            self.disable_initiator_tag = None
669
1107
        if getattr(self, "enabled", False):
670
 
            self.disable_initiator_tag = (gobject.timeout_add
671
 
                                          (timedelta_to_milliseconds
672
 
                                           (timeout), self.disable))
 
1108
            self.disable_initiator_tag = GLib.timeout_add(
 
1109
                int(timeout.total_seconds() * 1000), self.disable)
673
1110
            self.expires = datetime.datetime.utcnow() + timeout
674
 
    
 
1111
 
675
1112
    def need_approval(self):
676
1113
        self.last_approval_request = datetime.datetime.utcnow()
677
 
    
 
1114
 
678
1115
    def start_checker(self):
679
1116
        """Start a new checker subprocess if one is not running.
680
 
        
 
1117
 
681
1118
        If a checker already exists, leave it running and do
682
1119
        nothing."""
683
1120
        # The reason for not killing a running checker is that if we
688
1125
        # checkers alone, the checker would have to take more time
689
1126
        # than 'timeout' for the client to be disabled, which is as it
690
1127
        # should be.
691
 
        
692
 
        # If a checker exists, make sure it is not a zombie
693
 
        try:
694
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
695
 
        except AttributeError:
696
 
            pass
697
 
        except OSError as error:
698
 
            if error.errno != errno.ECHILD:
699
 
                raise
700
 
        else:
701
 
            if pid:
702
 
                logger.warning("Checker was a zombie")
703
 
                gobject.source_remove(self.checker_callback_tag)
704
 
                self.checker_callback(pid, status,
705
 
                                      self.current_checker_command)
 
1128
 
 
1129
        if self.checker is not None and not self.checker.is_alive():
 
1130
            logger.warning("Checker was not alive; joining")
 
1131
            self.checker.join()
 
1132
            self.checker = None
706
1133
        # Start a new checker if needed
707
1134
        if self.checker is None:
708
1135
            # Escape attributes for the shell
709
 
            escaped_attrs = dict(
710
 
                (attr, re.escape(unicode(getattr(self, attr))))
711
 
                for attr in
712
 
                self.runtime_expansions)
 
1136
            escaped_attrs = {
 
1137
                attr: shlex.quote(str(getattr(self, attr)))
 
1138
                for attr in self.runtime_expansions}
713
1139
            try:
714
1140
                command = self.checker_command % escaped_attrs
715
1141
            except TypeError as error:
716
1142
                logger.error('Could not format string "%s"',
717
 
                             self.checker_command, exc_info=error)
718
 
                return True # Try again later
 
1143
                             self.checker_command,
 
1144
                             exc_info=error)
 
1145
                return True     # Try again later
719
1146
            self.current_checker_command = command
720
 
            try:
721
 
                logger.info("Starting checker %r for %s",
722
 
                            command, self.name)
723
 
                # We don't need to redirect stdout and stderr, since
724
 
                # in normal mode, that is already done by daemon(),
725
 
                # and in debug mode we don't want to.  (Stdin is
726
 
                # always replaced by /dev/null.)
727
 
                # The exception is when not debugging but nevertheless
728
 
                # running in the foreground; use the previously
729
 
                # created wnull.
730
 
                popen_args = {}
731
 
                if (not self.server_settings["debug"]
732
 
                    and self.server_settings["foreground"]):
733
 
                    popen_args.update({"stdout": wnull,
734
 
                                       "stderr": wnull })
735
 
                self.checker = subprocess.Popen(command,
736
 
                                                close_fds=True,
737
 
                                                shell=True, cwd="/",
738
 
                                                **popen_args)
739
 
            except OSError as error:
740
 
                logger.error("Failed to start subprocess",
741
 
                             exc_info=error)
742
 
                return True
743
 
            self.checker_callback_tag = (gobject.child_watch_add
744
 
                                         (self.checker.pid,
745
 
                                          self.checker_callback,
746
 
                                          data=command))
747
 
            # The checker may have completed before the gobject
748
 
            # watch was added.  Check for this.
749
 
            try:
750
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
751
 
            except OSError as error:
752
 
                if error.errno == errno.ECHILD:
753
 
                    # This should never happen
754
 
                    logger.error("Child process vanished",
755
 
                                 exc_info=error)
756
 
                    return True
757
 
                raise
758
 
            if pid:
759
 
                gobject.source_remove(self.checker_callback_tag)
760
 
                self.checker_callback(pid, status, command)
761
 
        # Re-run this periodically if run by gobject.timeout_add
 
1147
            logger.info("Starting checker %r for %s", command,
 
1148
                        self.name)
 
1149
            # We don't need to redirect stdout and stderr, since
 
1150
            # in normal mode, that is already done by daemon(),
 
1151
            # and in debug mode we don't want to.  (Stdin is
 
1152
            # always replaced by /dev/null.)
 
1153
            # The exception is when not debugging but nevertheless
 
1154
            # running in the foreground; use the previously
 
1155
            # created wnull.
 
1156
            popen_args = {"close_fds": True,
 
1157
                          "shell": True,
 
1158
                          "cwd": "/"}
 
1159
            if (not self.server_settings["debug"]
 
1160
                and self.server_settings["foreground"]):
 
1161
                popen_args.update({"stdout": wnull,
 
1162
                                   "stderr": wnull})
 
1163
            pipe = multiprocessing.Pipe(duplex=False)
 
1164
            self.checker = multiprocessing.Process(
 
1165
                target=call_pipe,
 
1166
                args=(pipe[1], subprocess.call, command),
 
1167
                kwargs=popen_args)
 
1168
            self.checker.start()
 
1169
            self.checker_callback_tag = GLib.io_add_watch(
 
1170
                GLib.IOChannel.unix_new(pipe[0].fileno()),
 
1171
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
1172
                self.checker_callback, pipe[0], command)
 
1173
        # Re-run this periodically if run by GLib.timeout_add
762
1174
        return True
763
 
    
 
1175
 
764
1176
    def stop_checker(self):
765
1177
        """Force the checker process, if any, to stop."""
766
1178
        if self.checker_callback_tag:
767
 
            gobject.source_remove(self.checker_callback_tag)
 
1179
            GLib.source_remove(self.checker_callback_tag)
768
1180
            self.checker_callback_tag = None
769
1181
        if getattr(self, "checker", None) is None:
770
1182
            return
771
1183
        logger.debug("Stopping checker for %(name)s", vars(self))
772
 
        try:
773
 
            self.checker.terminate()
774
 
            #time.sleep(0.5)
775
 
            #if self.checker.poll() is None:
776
 
            #    self.checker.kill()
777
 
        except OSError as error:
778
 
            if error.errno != errno.ESRCH: # No such process
779
 
                raise
 
1184
        self.checker.terminate()
780
1185
        self.checker = None
781
1186
 
782
1187
 
783
 
def dbus_service_property(dbus_interface, signature="v",
784
 
                          access="readwrite", byte_arrays=False):
 
1188
def dbus_service_property(dbus_interface,
 
1189
                          signature="v",
 
1190
                          access="readwrite",
 
1191
                          byte_arrays=False):
785
1192
    """Decorators for marking methods of a DBusObjectWithProperties to
786
1193
    become properties on the D-Bus.
787
 
    
 
1194
 
788
1195
    The decorated method will be called with no arguments by "Get"
789
1196
    and with one argument by "Set".
790
 
    
 
1197
 
791
1198
    The parameters, where they are supported, are the same as
792
1199
    dbus.service.method, except there is only "signature", since the
793
1200
    type from Get() and the type sent to Set() is the same.
796
1203
    # "Set" method, so we fail early here:
797
1204
    if byte_arrays and signature != "ay":
798
1205
        raise ValueError("Byte arrays not supported for non-'ay'"
799
 
                         " signature {0!r}".format(signature))
 
1206
                         " signature {!r}".format(signature))
 
1207
 
800
1208
    def decorator(func):
801
1209
        func._dbus_is_property = True
802
1210
        func._dbus_interface = dbus_interface
805
1213
        func._dbus_name = func.__name__
806
1214
        if func._dbus_name.endswith("_dbus_property"):
807
1215
            func._dbus_name = func._dbus_name[:-14]
808
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
 
1216
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
809
1217
        return func
 
1218
 
810
1219
    return decorator
811
1220
 
812
1221
 
813
1222
def dbus_interface_annotations(dbus_interface):
814
1223
    """Decorator for marking functions returning interface annotations
815
 
    
 
1224
 
816
1225
    Usage:
817
 
    
 
1226
 
818
1227
    @dbus_interface_annotations("org.example.Interface")
819
1228
    def _foo(self):  # Function name does not matter
820
1229
        return {"org.freedesktop.DBus.Deprecated": "true",
821
1230
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
822
1231
                    "false"}
823
1232
    """
 
1233
 
824
1234
    def decorator(func):
825
1235
        func._dbus_is_interface = True
826
1236
        func._dbus_interface = dbus_interface
827
1237
        func._dbus_name = dbus_interface
828
1238
        return func
 
1239
 
829
1240
    return decorator
830
1241
 
831
1242
 
832
1243
def dbus_annotations(annotations):
833
1244
    """Decorator to annotate D-Bus methods, signals or properties
834
1245
    Usage:
835
 
    
 
1246
 
 
1247
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
 
1248
                       "org.freedesktop.DBus.Property."
 
1249
                       "EmitsChangedSignal": "false"})
836
1250
    @dbus_service_property("org.example.Interface", signature="b",
837
1251
                           access="r")
838
 
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
 
                        "org.freedesktop.DBus.Property."
840
 
                        "EmitsChangedSignal": "false"})
841
1252
    def Property_dbus_property(self):
842
1253
        return dbus.Boolean(False)
 
1254
 
 
1255
    See also the DBusObjectWithAnnotations class.
843
1256
    """
 
1257
 
844
1258
    def decorator(func):
845
1259
        func._dbus_annotations = annotations
846
1260
        return func
 
1261
 
847
1262
    return decorator
848
1263
 
849
1264
 
850
1265
class DBusPropertyException(dbus.exceptions.DBusException):
851
1266
    """A base class for D-Bus property-related exceptions
852
1267
    """
853
 
    def __unicode__(self):
854
 
        return unicode(str(self))
 
1268
    pass
855
1269
 
856
1270
 
857
1271
class DBusPropertyAccessException(DBusPropertyException):
866
1280
    pass
867
1281
 
868
1282
 
869
 
class DBusObjectWithProperties(dbus.service.Object):
870
 
    """A D-Bus object with properties.
871
 
    
872
 
    Classes inheriting from this can use the dbus_service_property
873
 
    decorator to expose methods as D-Bus properties.  It exposes the
874
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
 
1283
class DBusObjectWithAnnotations(dbus.service.Object):
 
1284
    """A D-Bus object with annotations.
 
1285
 
 
1286
    Classes inheriting from this can use the dbus_annotations
 
1287
    decorator to add annotations to methods or signals.
875
1288
    """
876
 
    
 
1289
 
877
1290
    @staticmethod
878
1291
    def _is_dbus_thing(thing):
879
1292
        """Returns a function testing if an attribute is a D-Bus thing
880
 
        
 
1293
 
881
1294
        If called like _is_dbus_thing("method") it returns a function
882
1295
        suitable for use as predicate to inspect.getmembers().
883
1296
        """
884
 
        return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
 
1297
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
885
1298
                                   False)
886
 
    
 
1299
 
887
1300
    def _get_all_dbus_things(self, thing):
888
1301
        """Returns a generator of (name, attribute) pairs
889
1302
        """
890
 
        return ((getattr(athing.__get__(self), "_dbus_name",
891
 
                         name),
 
1303
        return ((getattr(athing.__get__(self), "_dbus_name", name),
892
1304
                 athing.__get__(self))
893
1305
                for cls in self.__class__.__mro__
894
1306
                for name, athing in
895
 
                inspect.getmembers(cls,
896
 
                                   self._is_dbus_thing(thing)))
897
 
    
 
1307
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
 
1308
 
 
1309
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1310
                         out_signature="s",
 
1311
                         path_keyword='object_path',
 
1312
                         connection_keyword='connection')
 
1313
    def Introspect(self, object_path, connection):
 
1314
        """Overloading of standard D-Bus method.
 
1315
 
 
1316
        Inserts annotation tags on methods and signals.
 
1317
        """
 
1318
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
1319
                                                   connection)
 
1320
        try:
 
1321
            document = xml.dom.minidom.parseString(xmlstring)
 
1322
 
 
1323
            for if_tag in document.getElementsByTagName("interface"):
 
1324
                # Add annotation tags
 
1325
                for typ in ("method", "signal"):
 
1326
                    for tag in if_tag.getElementsByTagName(typ):
 
1327
                        annots = dict()
 
1328
                        for name, prop in (self.
 
1329
                                           _get_all_dbus_things(typ)):
 
1330
                            if (name == tag.getAttribute("name")
 
1331
                                and prop._dbus_interface
 
1332
                                == if_tag.getAttribute("name")):
 
1333
                                annots.update(getattr(
 
1334
                                    prop, "_dbus_annotations", {}))
 
1335
                        for name, value in annots.items():
 
1336
                            ann_tag = document.createElement(
 
1337
                                "annotation")
 
1338
                            ann_tag.setAttribute("name", name)
 
1339
                            ann_tag.setAttribute("value", value)
 
1340
                            tag.appendChild(ann_tag)
 
1341
                # Add interface annotation tags
 
1342
                for annotation, value in dict(
 
1343
                    itertools.chain.from_iterable(
 
1344
                        annotations().items()
 
1345
                        for name, annotations
 
1346
                        in self._get_all_dbus_things("interface")
 
1347
                        if name == if_tag.getAttribute("name")
 
1348
                        )).items():
 
1349
                    ann_tag = document.createElement("annotation")
 
1350
                    ann_tag.setAttribute("name", annotation)
 
1351
                    ann_tag.setAttribute("value", value)
 
1352
                    if_tag.appendChild(ann_tag)
 
1353
                # Fix argument name for the Introspect method itself
 
1354
                if (if_tag.getAttribute("name")
 
1355
                    == dbus.INTROSPECTABLE_IFACE):
 
1356
                    for cn in if_tag.getElementsByTagName("method"):
 
1357
                        if cn.getAttribute("name") == "Introspect":
 
1358
                            for arg in cn.getElementsByTagName("arg"):
 
1359
                                if (arg.getAttribute("direction")
 
1360
                                    == "out"):
 
1361
                                    arg.setAttribute("name",
 
1362
                                                     "xml_data")
 
1363
            xmlstring = document.toxml("utf-8")
 
1364
            document.unlink()
 
1365
        except (AttributeError, xml.dom.DOMException,
 
1366
                xml.parsers.expat.ExpatError) as error:
 
1367
            logger.error("Failed to override Introspection method",
 
1368
                         exc_info=error)
 
1369
        return xmlstring
 
1370
 
 
1371
 
 
1372
class DBusObjectWithProperties(DBusObjectWithAnnotations):
 
1373
    """A D-Bus object with properties.
 
1374
 
 
1375
    Classes inheriting from this can use the dbus_service_property
 
1376
    decorator to expose methods as D-Bus properties.  It exposes the
 
1377
    standard Get(), Set(), and GetAll() methods on the D-Bus.
 
1378
    """
 
1379
 
898
1380
    def _get_dbus_property(self, interface_name, property_name):
899
1381
        """Returns a bound method if one exists which is a D-Bus
900
1382
        property with the specified name and interface.
901
1383
        """
902
 
        for cls in  self.__class__.__mro__:
903
 
            for name, value in (inspect.getmembers
904
 
                                (cls,
905
 
                                 self._is_dbus_thing("property"))):
 
1384
        for cls in self.__class__.__mro__:
 
1385
            for name, value in inspect.getmembers(
 
1386
                    cls, self._is_dbus_thing("property")):
906
1387
                if (value._dbus_name == property_name
907
1388
                    and value._dbus_interface == interface_name):
908
1389
                    return value.__get__(self)
909
 
        
 
1390
 
910
1391
        # No such property
911
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
912
 
                                   + interface_name + "."
913
 
                                   + property_name)
914
 
    
915
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
 
1392
        raise DBusPropertyNotFound("{}:{}.{}".format(
 
1393
            self.dbus_object_path, interface_name, property_name))
 
1394
 
 
1395
    @classmethod
 
1396
    def _get_all_interface_names(cls):
 
1397
        """Get a sequence of all interfaces supported by an object"""
 
1398
        return (name for name in set(getattr(getattr(x, attr),
 
1399
                                             "_dbus_interface", None)
 
1400
                                     for x in (inspect.getmro(cls))
 
1401
                                     for attr in dir(x))
 
1402
                if name is not None)
 
1403
 
 
1404
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1405
                         in_signature="ss",
916
1406
                         out_signature="v")
917
1407
    def Get(self, interface_name, property_name):
918
1408
        """Standard D-Bus property Get() method, see D-Bus standard.
924
1414
        if not hasattr(value, "variant_level"):
925
1415
            return value
926
1416
        return type(value)(value, variant_level=value.variant_level+1)
927
 
    
 
1417
 
928
1418
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
1419
    def Set(self, interface_name, property_name, value):
930
1420
        """Standard D-Bus property Set() method, see D-Bus standard.
937
1427
            # signatures other than "ay".
938
1428
            if prop._dbus_signature != "ay":
939
1429
                raise ValueError("Byte arrays not supported for non-"
940
 
                                 "'ay' signature {0!r}"
 
1430
                                 "'ay' signature {!r}"
941
1431
                                 .format(prop._dbus_signature))
942
 
            value = dbus.ByteArray(b''.join(chr(byte)
943
 
                                            for byte in value))
 
1432
            value = dbus.ByteArray(bytes(value))
944
1433
        prop(value)
945
 
    
946
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
 
1434
 
 
1435
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1436
                         in_signature="s",
947
1437
                         out_signature="a{sv}")
948
1438
    def GetAll(self, interface_name):
949
1439
        """Standard D-Bus property GetAll() method, see D-Bus
950
1440
        standard.
951
 
        
 
1441
 
952
1442
        Note: Will not include properties with access="write".
953
1443
        """
954
1444
        properties = {}
964
1454
            if not hasattr(value, "variant_level"):
965
1455
                properties[name] = value
966
1456
                continue
967
 
            properties[name] = type(value)(value, variant_level=
968
 
                                           value.variant_level+1)
 
1457
            properties[name] = type(value)(
 
1458
                value, variant_level=value.variant_level + 1)
969
1459
        return dbus.Dictionary(properties, signature="sv")
970
 
    
 
1460
 
 
1461
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
 
1462
    def PropertiesChanged(self, interface_name, changed_properties,
 
1463
                          invalidated_properties):
 
1464
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
 
1465
        standard.
 
1466
        """
 
1467
        pass
 
1468
 
971
1469
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
972
1470
                         out_signature="s",
973
1471
                         path_keyword='object_path',
974
1472
                         connection_keyword='connection')
975
1473
    def Introspect(self, object_path, connection):
976
1474
        """Overloading of standard D-Bus method.
977
 
        
 
1475
 
978
1476
        Inserts property tags and interface annotation tags.
979
1477
        """
980
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
981
 
                                                   connection)
 
1478
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1479
                                                         object_path,
 
1480
                                                         connection)
982
1481
        try:
983
1482
            document = xml.dom.minidom.parseString(xmlstring)
 
1483
 
984
1484
            def make_tag(document, name, prop):
985
1485
                e = document.createElement("property")
986
1486
                e.setAttribute("name", name)
987
1487
                e.setAttribute("type", prop._dbus_signature)
988
1488
                e.setAttribute("access", prop._dbus_access)
989
1489
                return e
 
1490
 
990
1491
            for if_tag in document.getElementsByTagName("interface"):
991
1492
                # Add property tags
992
1493
                for tag in (make_tag(document, name, prop)
995
1496
                            if prop._dbus_interface
996
1497
                            == if_tag.getAttribute("name")):
997
1498
                    if_tag.appendChild(tag)
998
 
                # Add annotation tags
999
 
                for typ in ("method", "signal", "property"):
1000
 
                    for tag in if_tag.getElementsByTagName(typ):
1001
 
                        annots = dict()
1002
 
                        for name, prop in (self.
1003
 
                                           _get_all_dbus_things(typ)):
1004
 
                            if (name == tag.getAttribute("name")
1005
 
                                and prop._dbus_interface
1006
 
                                == if_tag.getAttribute("name")):
1007
 
                                annots.update(getattr
1008
 
                                              (prop,
1009
 
                                               "_dbus_annotations",
1010
 
                                               {}))
1011
 
                        for name, value in annots.iteritems():
1012
 
                            ann_tag = document.createElement(
1013
 
                                "annotation")
1014
 
                            ann_tag.setAttribute("name", name)
1015
 
                            ann_tag.setAttribute("value", value)
1016
 
                            tag.appendChild(ann_tag)
1017
 
                # Add interface annotation tags
1018
 
                for annotation, value in dict(
1019
 
                    itertools.chain.from_iterable(
1020
 
                        annotations().iteritems()
1021
 
                        for name, annotations in
1022
 
                        self._get_all_dbus_things("interface")
1023
 
                        if name == if_tag.getAttribute("name")
1024
 
                        )).iteritems():
1025
 
                    ann_tag = document.createElement("annotation")
1026
 
                    ann_tag.setAttribute("name", annotation)
1027
 
                    ann_tag.setAttribute("value", value)
1028
 
                    if_tag.appendChild(ann_tag)
 
1499
                # Add annotation tags for properties
 
1500
                for tag in if_tag.getElementsByTagName("property"):
 
1501
                    annots = dict()
 
1502
                    for name, prop in self._get_all_dbus_things(
 
1503
                            "property"):
 
1504
                        if (name == tag.getAttribute("name")
 
1505
                            and prop._dbus_interface
 
1506
                            == if_tag.getAttribute("name")):
 
1507
                            annots.update(getattr(
 
1508
                                prop, "_dbus_annotations", {}))
 
1509
                    for name, value in annots.items():
 
1510
                        ann_tag = document.createElement(
 
1511
                            "annotation")
 
1512
                        ann_tag.setAttribute("name", name)
 
1513
                        ann_tag.setAttribute("value", value)
 
1514
                        tag.appendChild(ann_tag)
1029
1515
                # Add the names to the return values for the
1030
1516
                # "org.freedesktop.DBus.Properties" methods
1031
1517
                if (if_tag.getAttribute("name")
1050
1536
        return xmlstring
1051
1537
 
1052
1538
 
 
1539
try:
 
1540
    dbus.OBJECT_MANAGER_IFACE
 
1541
except AttributeError:
 
1542
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
1543
 
 
1544
 
 
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
 
1546
    """A D-Bus object with an ObjectManager.
 
1547
 
 
1548
    Classes inheriting from this exposes the standard
 
1549
    GetManagedObjects call and the InterfacesAdded and
 
1550
    InterfacesRemoved signals on the standard
 
1551
    "org.freedesktop.DBus.ObjectManager" interface.
 
1552
 
 
1553
    Note: No signals are sent automatically; they must be sent
 
1554
    manually.
 
1555
    """
 
1556
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
1557
                         out_signature="a{oa{sa{sv}}}")
 
1558
    def GetManagedObjects(self):
 
1559
        """This function must be overridden"""
 
1560
        raise NotImplementedError()
 
1561
 
 
1562
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
 
1563
                         signature="oa{sa{sv}}")
 
1564
    def InterfacesAdded(self, object_path, interfaces_and_properties):
 
1565
        pass
 
1566
 
 
1567
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
 
1568
    def InterfacesRemoved(self, object_path, interfaces):
 
1569
        pass
 
1570
 
 
1571
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1572
                         out_signature="s",
 
1573
                         path_keyword='object_path',
 
1574
                         connection_keyword='connection')
 
1575
    def Introspect(self, object_path, connection):
 
1576
        """Overloading of standard D-Bus method.
 
1577
 
 
1578
        Override return argument name of GetManagedObjects to be
 
1579
        "objpath_interfaces_and_properties"
 
1580
        """
 
1581
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1582
                                                         object_path,
 
1583
                                                         connection)
 
1584
        try:
 
1585
            document = xml.dom.minidom.parseString(xmlstring)
 
1586
 
 
1587
            for if_tag in document.getElementsByTagName("interface"):
 
1588
                # Fix argument name for the GetManagedObjects method
 
1589
                if (if_tag.getAttribute("name")
 
1590
                    == dbus.OBJECT_MANAGER_IFACE):
 
1591
                    for cn in if_tag.getElementsByTagName("method"):
 
1592
                        if (cn.getAttribute("name")
 
1593
                            == "GetManagedObjects"):
 
1594
                            for arg in cn.getElementsByTagName("arg"):
 
1595
                                if (arg.getAttribute("direction")
 
1596
                                    == "out"):
 
1597
                                    arg.setAttribute(
 
1598
                                        "name",
 
1599
                                        "objpath_interfaces"
 
1600
                                        "_and_properties")
 
1601
            xmlstring = document.toxml("utf-8")
 
1602
            document.unlink()
 
1603
        except (AttributeError, xml.dom.DOMException,
 
1604
                xml.parsers.expat.ExpatError) as error:
 
1605
            logger.error("Failed to override Introspection method",
 
1606
                         exc_info=error)
 
1607
        return xmlstring
 
1608
 
 
1609
 
1053
1610
def datetime_to_dbus(dt, variant_level=0):
1054
1611
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1055
1612
    if dt is None:
1056
 
        return dbus.String("", variant_level = variant_level)
1057
 
    return dbus.String(dt.isoformat(),
1058
 
                       variant_level=variant_level)
 
1613
        return dbus.String("", variant_level=variant_level)
 
1614
    return dbus.String(dt.isoformat(), variant_level=variant_level)
1059
1615
 
1060
1616
 
1061
1617
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1063
1619
    dbus.service.Object, it will add alternate D-Bus attributes with
1064
1620
    interface names according to the "alt_interface_names" mapping.
1065
1621
    Usage:
1066
 
    
 
1622
 
1067
1623
    @alternate_dbus_interfaces({"org.example.Interface":
1068
1624
                                    "net.example.AlternateInterface"})
1069
1625
    class SampleDBusObject(dbus.service.Object):
1070
1626
        @dbus.service.method("org.example.Interface")
1071
1627
        def SampleDBusMethod():
1072
1628
            pass
1073
 
    
 
1629
 
1074
1630
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
1631
    reachable via two interfaces: "org.example.Interface" and
1076
1632
    "net.example.AlternateInterface", the latter of which will have
1077
1633
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
1634
    "true", unless "deprecate" is passed with a False value.
1079
 
    
 
1635
 
1080
1636
    This works for methods and signals, and also for D-Bus properties
1081
1637
    (from DBusObjectWithProperties) and interfaces (from the
1082
1638
    dbus_interface_annotations decorator).
1083
1639
    """
 
1640
 
1084
1641
    def wrapper(cls):
1085
1642
        for orig_interface_name, alt_interface_name in (
1086
 
            alt_interface_names.iteritems()):
 
1643
                alt_interface_names.items()):
1087
1644
            attr = {}
1088
1645
            interface_names = set()
1089
1646
            # Go though all attributes of the class
1091
1648
                # Ignore non-D-Bus attributes, and D-Bus attributes
1092
1649
                # with the wrong interface name
1093
1650
                if (not hasattr(attribute, "_dbus_interface")
1094
 
                    or not attribute._dbus_interface
1095
 
                    .startswith(orig_interface_name)):
 
1651
                    or not attribute._dbus_interface.startswith(
 
1652
                        orig_interface_name)):
1096
1653
                    continue
1097
1654
                # Create an alternate D-Bus interface name based on
1098
1655
                # the current name
1099
 
                alt_interface = (attribute._dbus_interface
1100
 
                                 .replace(orig_interface_name,
1101
 
                                          alt_interface_name))
 
1656
                alt_interface = attribute._dbus_interface.replace(
 
1657
                    orig_interface_name, alt_interface_name)
1102
1658
                interface_names.add(alt_interface)
1103
1659
                # Is this a D-Bus signal?
1104
1660
                if getattr(attribute, "_dbus_is_signal", False):
1105
1661
                    # Extract the original non-method undecorated
1106
1662
                    # function by black magic
1107
 
                    nonmethod_func = (dict(
 
1663
                    if sys.version_info.major == 2:
 
1664
                        nonmethod_func = (dict(
1108
1665
                            zip(attribute.func_code.co_freevars,
1109
 
                                attribute.__closure__))["func"]
1110
 
                                      .cell_contents)
 
1666
                                attribute.__closure__))
 
1667
                                          ["func"].cell_contents)
 
1668
                    else:
 
1669
                        nonmethod_func = (dict(
 
1670
                            zip(attribute.__code__.co_freevars,
 
1671
                                attribute.__closure__))
 
1672
                                          ["func"].cell_contents)
1111
1673
                    # Create a new, but exactly alike, function
1112
1674
                    # object, and decorate it to be a new D-Bus signal
1113
1675
                    # with the alternate D-Bus interface name
1114
 
                    new_function = (dbus.service.signal
1115
 
                                    (alt_interface,
1116
 
                                     attribute._dbus_signature)
1117
 
                                    (types.FunctionType(
1118
 
                                nonmethod_func.func_code,
1119
 
                                nonmethod_func.func_globals,
1120
 
                                nonmethod_func.func_name,
1121
 
                                nonmethod_func.func_defaults,
1122
 
                                nonmethod_func.func_closure)))
 
1676
                    new_function = copy_function(nonmethod_func)
 
1677
                    new_function = (dbus.service.signal(
 
1678
                        alt_interface,
 
1679
                        attribute._dbus_signature)(new_function))
1123
1680
                    # Copy annotations, if any
1124
1681
                    try:
1125
 
                        new_function._dbus_annotations = (
1126
 
                            dict(attribute._dbus_annotations))
 
1682
                        new_function._dbus_annotations = dict(
 
1683
                            attribute._dbus_annotations)
1127
1684
                    except AttributeError:
1128
1685
                        pass
 
1686
 
1129
1687
                    # Define a creator of a function to call both the
1130
1688
                    # original and alternate functions, so both the
1131
1689
                    # original and alternate signals gets sent when
1134
1692
                        """This function is a scope container to pass
1135
1693
                        func1 and func2 to the "call_both" function
1136
1694
                        outside of its arguments"""
 
1695
 
 
1696
                        @functools.wraps(func2)
1137
1697
                        def call_both(*args, **kwargs):
1138
1698
                            """This function will emit two D-Bus
1139
1699
                            signals by calling func1 and func2"""
1140
1700
                            func1(*args, **kwargs)
1141
1701
                            func2(*args, **kwargs)
 
1702
                        # Make wrapper function look like a D-Bus
 
1703
                        # signal
 
1704
                        for name, attr in inspect.getmembers(func2):
 
1705
                            if name.startswith("_dbus_"):
 
1706
                                setattr(call_both, name, attr)
 
1707
 
1142
1708
                        return call_both
1143
1709
                    # Create the "call_both" function and add it to
1144
1710
                    # the class
1149
1715
                    # object.  Decorate it to be a new D-Bus method
1150
1716
                    # with the alternate D-Bus interface name.  Add it
1151
1717
                    # to the class.
1152
 
                    attr[attrname] = (dbus.service.method
1153
 
                                      (alt_interface,
1154
 
                                       attribute._dbus_in_signature,
1155
 
                                       attribute._dbus_out_signature)
1156
 
                                      (types.FunctionType
1157
 
                                       (attribute.func_code,
1158
 
                                        attribute.func_globals,
1159
 
                                        attribute.func_name,
1160
 
                                        attribute.func_defaults,
1161
 
                                        attribute.func_closure)))
 
1718
                    attr[attrname] = (
 
1719
                        dbus.service.method(
 
1720
                            alt_interface,
 
1721
                            attribute._dbus_in_signature,
 
1722
                            attribute._dbus_out_signature)
 
1723
                        (copy_function(attribute)))
1162
1724
                    # Copy annotations, if any
1163
1725
                    try:
1164
 
                        attr[attrname]._dbus_annotations = (
1165
 
                            dict(attribute._dbus_annotations))
 
1726
                        attr[attrname]._dbus_annotations = dict(
 
1727
                            attribute._dbus_annotations)
1166
1728
                    except AttributeError:
1167
1729
                        pass
1168
1730
                # Is this a D-Bus property?
1171
1733
                    # object, and decorate it to be a new D-Bus
1172
1734
                    # property with the alternate D-Bus interface
1173
1735
                    # name.  Add it to the class.
1174
 
                    attr[attrname] = (dbus_service_property
1175
 
                                      (alt_interface,
1176
 
                                       attribute._dbus_signature,
1177
 
                                       attribute._dbus_access,
1178
 
                                       attribute
1179
 
                                       ._dbus_get_args_options
1180
 
                                       ["byte_arrays"])
1181
 
                                      (types.FunctionType
1182
 
                                       (attribute.func_code,
1183
 
                                        attribute.func_globals,
1184
 
                                        attribute.func_name,
1185
 
                                        attribute.func_defaults,
1186
 
                                        attribute.func_closure)))
 
1736
                    attr[attrname] = (dbus_service_property(
 
1737
                        alt_interface, attribute._dbus_signature,
 
1738
                        attribute._dbus_access,
 
1739
                        attribute._dbus_get_args_options
 
1740
                        ["byte_arrays"])
 
1741
                                      (copy_function(attribute)))
1187
1742
                    # Copy annotations, if any
1188
1743
                    try:
1189
 
                        attr[attrname]._dbus_annotations = (
1190
 
                            dict(attribute._dbus_annotations))
 
1744
                        attr[attrname]._dbus_annotations = dict(
 
1745
                            attribute._dbus_annotations)
1191
1746
                    except AttributeError:
1192
1747
                        pass
1193
1748
                # Is this a D-Bus interface?
1196
1751
                    # object.  Decorate it to be a new D-Bus interface
1197
1752
                    # with the alternate D-Bus interface name.  Add it
1198
1753
                    # to the class.
1199
 
                    attr[attrname] = (dbus_interface_annotations
1200
 
                                      (alt_interface)
1201
 
                                      (types.FunctionType
1202
 
                                       (attribute.func_code,
1203
 
                                        attribute.func_globals,
1204
 
                                        attribute.func_name,
1205
 
                                        attribute.func_defaults,
1206
 
                                        attribute.func_closure)))
 
1754
                    attr[attrname] = (
 
1755
                        dbus_interface_annotations(alt_interface)
 
1756
                        (copy_function(attribute)))
1207
1757
            if deprecate:
1208
1758
                # Deprecate all alternate interfaces
1209
 
                iname="_AlternateDBusNames_interface_annotation{0}"
 
1759
                iname = "_AlternateDBusNames_interface_annotation{}"
1210
1760
                for interface_name in interface_names:
 
1761
 
1211
1762
                    @dbus_interface_annotations(interface_name)
1212
1763
                    def func(self):
1213
 
                        return { "org.freedesktop.DBus.Deprecated":
1214
 
                                     "true" }
 
1764
                        return {"org.freedesktop.DBus.Deprecated":
 
1765
                                "true"}
1215
1766
                    # Find an unused name
1216
1767
                    for aname in (iname.format(i)
1217
1768
                                  for i in itertools.count()):
1221
1772
            if interface_names:
1222
1773
                # Replace the class with a new subclass of it with
1223
1774
                # methods, signals, etc. as created above.
1224
 
                cls = type(b"{0}Alternate".format(cls.__name__),
1225
 
                           (cls,), attr)
 
1775
                if sys.version_info.major == 2:
 
1776
                    cls = type(b"{}Alternate".format(cls.__name__),
 
1777
                               (cls, ), attr)
 
1778
                else:
 
1779
                    cls = type("{}Alternate".format(cls.__name__),
 
1780
                               (cls, ), attr)
1226
1781
        return cls
 
1782
 
1227
1783
    return wrapper
1228
1784
 
1229
1785
 
1230
1786
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
 
                                "se.bsnet.fukt.Mandos"})
 
1787
                            "se.bsnet.fukt.Mandos"})
1232
1788
class ClientDBus(Client, DBusObjectWithProperties):
1233
1789
    """A Client class using D-Bus
1234
 
    
 
1790
 
1235
1791
    Attributes:
1236
1792
    dbus_object_path: dbus.ObjectPath
1237
1793
    bus: dbus.SystemBus()
1238
1794
    """
1239
 
    
 
1795
 
1240
1796
    runtime_expansions = (Client.runtime_expansions
1241
 
                          + ("dbus_object_path",))
1242
 
    
 
1797
                          + ("dbus_object_path", ))
 
1798
 
 
1799
    _interface = "se.recompile.Mandos.Client"
 
1800
 
1243
1801
    # dbus.service.Object doesn't use super(), so we can't either.
1244
 
    
1245
 
    def __init__(self, bus = None, *args, **kwargs):
 
1802
 
 
1803
    def __init__(self, bus=None, *args, **kwargs):
1246
1804
        self.bus = bus
1247
1805
        Client.__init__(self, *args, **kwargs)
1248
1806
        # Only now, when this client is initialized, can it show up on
1249
1807
        # the D-Bus
1250
 
        client_object_name = unicode(self.name).translate(
 
1808
        client_object_name = str(self.name).translate(
1251
1809
            {ord("."): ord("_"),
1252
1810
             ord("-"): ord("_")})
1253
 
        self.dbus_object_path = (dbus.ObjectPath
1254
 
                                 ("/clients/" + client_object_name))
 
1811
        self.dbus_object_path = dbus.ObjectPath(
 
1812
            "/clients/" + client_object_name)
1255
1813
        DBusObjectWithProperties.__init__(self, self.bus,
1256
1814
                                          self.dbus_object_path)
1257
 
    
1258
 
    def notifychangeproperty(transform_func,
1259
 
                             dbus_name, type_func=lambda x: x,
1260
 
                             variant_level=1):
 
1815
 
 
1816
    def notifychangeproperty(transform_func, dbus_name,
 
1817
                             type_func=lambda x: x,
 
1818
                             variant_level=1,
 
1819
                             invalidate_only=False,
 
1820
                             _interface=_interface):
1261
1821
        """ Modify a variable so that it's a property which announces
1262
1822
        its changes to DBus.
1263
 
        
 
1823
 
1264
1824
        transform_fun: Function that takes a value and a variant_level
1265
1825
                       and transforms it to a D-Bus type.
1266
1826
        dbus_name: D-Bus name of the variable
1268
1828
                   to the D-Bus.  Default: no transform
1269
1829
        variant_level: D-Bus variant level.  Default: 1
1270
1830
        """
1271
 
        attrname = "_{0}".format(dbus_name)
 
1831
        attrname = "_{}".format(dbus_name)
 
1832
 
1272
1833
        def setter(self, value):
1273
1834
            if hasattr(self, "dbus_object_path"):
1274
1835
                if (not hasattr(self, attrname) or
1275
1836
                    type_func(getattr(self, attrname, None))
1276
1837
                    != type_func(value)):
1277
 
                    dbus_value = transform_func(type_func(value),
1278
 
                                                variant_level
1279
 
                                                =variant_level)
1280
 
                    self.PropertyChanged(dbus.String(dbus_name),
1281
 
                                         dbus_value)
 
1838
                    if invalidate_only:
 
1839
                        self.PropertiesChanged(
 
1840
                            _interface, dbus.Dictionary(),
 
1841
                            dbus.Array((dbus_name, )))
 
1842
                    else:
 
1843
                        dbus_value = transform_func(
 
1844
                            type_func(value),
 
1845
                            variant_level=variant_level)
 
1846
                        self.PropertyChanged(dbus.String(dbus_name),
 
1847
                                             dbus_value)
 
1848
                        self.PropertiesChanged(
 
1849
                            _interface,
 
1850
                            dbus.Dictionary({dbus.String(dbus_name):
 
1851
                                             dbus_value}),
 
1852
                            dbus.Array())
1282
1853
            setattr(self, attrname, value)
1283
 
        
 
1854
 
1284
1855
        return property(lambda self: getattr(self, attrname), setter)
1285
 
    
 
1856
 
1286
1857
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1287
1858
    approvals_pending = notifychangeproperty(dbus.Boolean,
1288
1859
                                             "ApprovalPending",
1289
 
                                             type_func = bool)
 
1860
                                             type_func=bool)
1290
1861
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1291
1862
    last_enabled = notifychangeproperty(datetime_to_dbus,
1292
1863
                                        "LastEnabled")
1293
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1294
 
                                   type_func = lambda checker:
1295
 
                                       checker is not None)
 
1864
    checker = notifychangeproperty(
 
1865
        dbus.Boolean, "CheckerRunning",
 
1866
        type_func=lambda checker: checker is not None)
1296
1867
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1297
1868
                                           "LastCheckedOK")
1298
1869
    last_checker_status = notifychangeproperty(dbus.Int16,
1301
1872
        datetime_to_dbus, "LastApprovalRequest")
1302
1873
    approved_by_default = notifychangeproperty(dbus.Boolean,
1303
1874
                                               "ApprovedByDefault")
1304
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1305
 
                                          "ApprovalDelay",
1306
 
                                          type_func =
1307
 
                                          timedelta_to_milliseconds)
 
1875
    approval_delay = notifychangeproperty(
 
1876
        dbus.UInt64, "ApprovalDelay",
 
1877
        type_func=lambda td: td.total_seconds() * 1000)
1308
1878
    approval_duration = notifychangeproperty(
1309
1879
        dbus.UInt64, "ApprovalDuration",
1310
 
        type_func = timedelta_to_milliseconds)
 
1880
        type_func=lambda td: td.total_seconds() * 1000)
1311
1881
    host = notifychangeproperty(dbus.String, "Host")
1312
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
 
                                   type_func =
1314
 
                                   timedelta_to_milliseconds)
 
1882
    timeout = notifychangeproperty(
 
1883
        dbus.UInt64, "Timeout",
 
1884
        type_func=lambda td: td.total_seconds() * 1000)
1315
1885
    extended_timeout = notifychangeproperty(
1316
1886
        dbus.UInt64, "ExtendedTimeout",
1317
 
        type_func = timedelta_to_milliseconds)
1318
 
    interval = notifychangeproperty(dbus.UInt64,
1319
 
                                    "Interval",
1320
 
                                    type_func =
1321
 
                                    timedelta_to_milliseconds)
 
1887
        type_func=lambda td: td.total_seconds() * 1000)
 
1888
    interval = notifychangeproperty(
 
1889
        dbus.UInt64, "Interval",
 
1890
        type_func=lambda td: td.total_seconds() * 1000)
1322
1891
    checker_command = notifychangeproperty(dbus.String, "Checker")
1323
 
    
 
1892
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
 
1893
                                  invalidate_only=True)
 
1894
 
1324
1895
    del notifychangeproperty
1325
 
    
 
1896
 
1326
1897
    def __del__(self, *args, **kwargs):
1327
1898
        try:
1328
1899
            self.remove_from_connection()
1331
1902
        if hasattr(DBusObjectWithProperties, "__del__"):
1332
1903
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1333
1904
        Client.__del__(self, *args, **kwargs)
1334
 
    
1335
 
    def checker_callback(self, pid, condition, command,
1336
 
                         *args, **kwargs):
1337
 
        self.checker_callback_tag = None
1338
 
        self.checker = None
1339
 
        if os.WIFEXITED(condition):
1340
 
            exitstatus = os.WEXITSTATUS(condition)
 
1905
 
 
1906
    def checker_callback(self, source, condition,
 
1907
                         connection, command, *args, **kwargs):
 
1908
        ret = Client.checker_callback(self, source, condition,
 
1909
                                      connection, command, *args,
 
1910
                                      **kwargs)
 
1911
        exitstatus = self.last_checker_status
 
1912
        if exitstatus >= 0:
1341
1913
            # Emit D-Bus signal
1342
1914
            self.CheckerCompleted(dbus.Int16(exitstatus),
1343
 
                                  dbus.Int64(condition),
 
1915
                                  # This is specific to GNU libC
 
1916
                                  dbus.Int64(exitstatus << 8),
1344
1917
                                  dbus.String(command))
1345
1918
        else:
1346
1919
            # Emit D-Bus signal
1347
1920
            self.CheckerCompleted(dbus.Int16(-1),
1348
 
                                  dbus.Int64(condition),
 
1921
                                  dbus.Int64(
 
1922
                                      # This is specific to GNU libC
 
1923
                                      (exitstatus << 8)
 
1924
                                      | self.last_checker_signal),
1349
1925
                                  dbus.String(command))
1350
 
        
1351
 
        return Client.checker_callback(self, pid, condition, command,
1352
 
                                       *args, **kwargs)
1353
 
    
 
1926
        return ret
 
1927
 
1354
1928
    def start_checker(self, *args, **kwargs):
1355
1929
        old_checker_pid = getattr(self.checker, "pid", None)
1356
1930
        r = Client.start_checker(self, *args, **kwargs)
1360
1934
            # Emit D-Bus signal
1361
1935
            self.CheckerStarted(self.current_checker_command)
1362
1936
        return r
1363
 
    
 
1937
 
1364
1938
    def _reset_approved(self):
1365
1939
        self.approved = None
1366
1940
        return False
1367
 
    
 
1941
 
1368
1942
    def approve(self, value=True):
1369
1943
        self.approved = value
1370
 
        gobject.timeout_add(timedelta_to_milliseconds
1371
 
                            (self.approval_duration),
1372
 
                            self._reset_approved)
 
1944
        GLib.timeout_add(int(self.approval_duration.total_seconds()
 
1945
                             * 1000), self._reset_approved)
1373
1946
        self.send_changedstate()
1374
 
    
1375
 
    ## D-Bus methods, signals & properties
1376
 
    _interface = "se.recompile.Mandos.Client"
1377
 
    
1378
 
    ## Interfaces
1379
 
    
1380
 
    @dbus_interface_annotations(_interface)
1381
 
    def _foo(self):
1382
 
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1383
 
                     "false"}
1384
 
    
1385
 
    ## Signals
1386
 
    
 
1947
 
 
1948
    #  D-Bus methods, signals & properties
 
1949
 
 
1950
    #  Interfaces
 
1951
 
 
1952
    #  Signals
 
1953
 
1387
1954
    # CheckerCompleted - signal
1388
1955
    @dbus.service.signal(_interface, signature="nxs")
1389
1956
    def CheckerCompleted(self, exitcode, waitstatus, command):
1390
1957
        "D-Bus signal"
1391
1958
        pass
1392
 
    
 
1959
 
1393
1960
    # CheckerStarted - signal
1394
1961
    @dbus.service.signal(_interface, signature="s")
1395
1962
    def CheckerStarted(self, command):
1396
1963
        "D-Bus signal"
1397
1964
        pass
1398
 
    
 
1965
 
1399
1966
    # PropertyChanged - signal
 
1967
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1400
1968
    @dbus.service.signal(_interface, signature="sv")
1401
1969
    def PropertyChanged(self, property, value):
1402
1970
        "D-Bus signal"
1403
1971
        pass
1404
 
    
 
1972
 
1405
1973
    # GotSecret - signal
1406
1974
    @dbus.service.signal(_interface)
1407
1975
    def GotSecret(self):
1410
1978
        server to mandos-client
1411
1979
        """
1412
1980
        pass
1413
 
    
 
1981
 
1414
1982
    # Rejected - signal
1415
1983
    @dbus.service.signal(_interface, signature="s")
1416
1984
    def Rejected(self, reason):
1417
1985
        "D-Bus signal"
1418
1986
        pass
1419
 
    
 
1987
 
1420
1988
    # NeedApproval - signal
1421
1989
    @dbus.service.signal(_interface, signature="tb")
1422
1990
    def NeedApproval(self, timeout, default):
1423
1991
        "D-Bus signal"
1424
1992
        return self.need_approval()
1425
 
    
1426
 
    ## Methods
1427
 
    
 
1993
 
 
1994
    #  Methods
 
1995
 
1428
1996
    # Approve - method
1429
1997
    @dbus.service.method(_interface, in_signature="b")
1430
1998
    def Approve(self, value):
1431
1999
        self.approve(value)
1432
 
    
 
2000
 
1433
2001
    # CheckedOK - method
1434
2002
    @dbus.service.method(_interface)
1435
2003
    def CheckedOK(self):
1436
2004
        self.checked_ok()
1437
 
    
 
2005
 
1438
2006
    # Enable - method
 
2007
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1439
2008
    @dbus.service.method(_interface)
1440
2009
    def Enable(self):
1441
2010
        "D-Bus method"
1442
2011
        self.enable()
1443
 
    
 
2012
 
1444
2013
    # StartChecker - method
 
2014
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1445
2015
    @dbus.service.method(_interface)
1446
2016
    def StartChecker(self):
1447
2017
        "D-Bus method"
1448
2018
        self.start_checker()
1449
 
    
 
2019
 
1450
2020
    # Disable - method
 
2021
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1451
2022
    @dbus.service.method(_interface)
1452
2023
    def Disable(self):
1453
2024
        "D-Bus method"
1454
2025
        self.disable()
1455
 
    
 
2026
 
1456
2027
    # StopChecker - method
 
2028
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1457
2029
    @dbus.service.method(_interface)
1458
2030
    def StopChecker(self):
1459
2031
        self.stop_checker()
1460
 
    
1461
 
    ## Properties
1462
 
    
 
2032
 
 
2033
    #  Properties
 
2034
 
1463
2035
    # ApprovalPending - property
1464
2036
    @dbus_service_property(_interface, signature="b", access="read")
1465
2037
    def ApprovalPending_dbus_property(self):
1466
2038
        return dbus.Boolean(bool(self.approvals_pending))
1467
 
    
 
2039
 
1468
2040
    # ApprovedByDefault - property
1469
 
    @dbus_service_property(_interface, signature="b",
 
2041
    @dbus_service_property(_interface,
 
2042
                           signature="b",
1470
2043
                           access="readwrite")
1471
2044
    def ApprovedByDefault_dbus_property(self, value=None):
1472
2045
        if value is None:       # get
1473
2046
            return dbus.Boolean(self.approved_by_default)
1474
2047
        self.approved_by_default = bool(value)
1475
 
    
 
2048
 
1476
2049
    # ApprovalDelay - property
1477
 
    @dbus_service_property(_interface, signature="t",
 
2050
    @dbus_service_property(_interface,
 
2051
                           signature="t",
1478
2052
                           access="readwrite")
1479
2053
    def ApprovalDelay_dbus_property(self, value=None):
1480
2054
        if value is None:       # get
1481
 
            return dbus.UInt64(self.approval_delay_milliseconds())
 
2055
            return dbus.UInt64(self.approval_delay.total_seconds()
 
2056
                               * 1000)
1482
2057
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1483
 
    
 
2058
 
1484
2059
    # ApprovalDuration - property
1485
 
    @dbus_service_property(_interface, signature="t",
 
2060
    @dbus_service_property(_interface,
 
2061
                           signature="t",
1486
2062
                           access="readwrite")
1487
2063
    def ApprovalDuration_dbus_property(self, value=None):
1488
2064
        if value is None:       # get
1489
 
            return dbus.UInt64(timedelta_to_milliseconds(
1490
 
                    self.approval_duration))
 
2065
            return dbus.UInt64(self.approval_duration.total_seconds()
 
2066
                               * 1000)
1491
2067
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1492
 
    
 
2068
 
1493
2069
    # Name - property
 
2070
    @dbus_annotations(
 
2071
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1494
2072
    @dbus_service_property(_interface, signature="s", access="read")
1495
2073
    def Name_dbus_property(self):
1496
2074
        return dbus.String(self.name)
1497
 
    
 
2075
 
 
2076
    # KeyID - property
 
2077
    @dbus_annotations(
 
2078
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
 
2079
    @dbus_service_property(_interface, signature="s", access="read")
 
2080
    def KeyID_dbus_property(self):
 
2081
        return dbus.String(self.key_id)
 
2082
 
1498
2083
    # Fingerprint - property
 
2084
    @dbus_annotations(
 
2085
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1499
2086
    @dbus_service_property(_interface, signature="s", access="read")
1500
2087
    def Fingerprint_dbus_property(self):
1501
2088
        return dbus.String(self.fingerprint)
1502
 
    
 
2089
 
1503
2090
    # Host - property
1504
 
    @dbus_service_property(_interface, signature="s",
 
2091
    @dbus_service_property(_interface,
 
2092
                           signature="s",
1505
2093
                           access="readwrite")
1506
2094
    def Host_dbus_property(self, value=None):
1507
2095
        if value is None:       # get
1508
2096
            return dbus.String(self.host)
1509
 
        self.host = unicode(value)
1510
 
    
 
2097
        self.host = str(value)
 
2098
 
1511
2099
    # Created - property
 
2100
    @dbus_annotations(
 
2101
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1512
2102
    @dbus_service_property(_interface, signature="s", access="read")
1513
2103
    def Created_dbus_property(self):
1514
2104
        return datetime_to_dbus(self.created)
1515
 
    
 
2105
 
1516
2106
    # LastEnabled - property
1517
2107
    @dbus_service_property(_interface, signature="s", access="read")
1518
2108
    def LastEnabled_dbus_property(self):
1519
2109
        return datetime_to_dbus(self.last_enabled)
1520
 
    
 
2110
 
1521
2111
    # Enabled - property
1522
 
    @dbus_service_property(_interface, signature="b",
 
2112
    @dbus_service_property(_interface,
 
2113
                           signature="b",
1523
2114
                           access="readwrite")
1524
2115
    def Enabled_dbus_property(self, value=None):
1525
2116
        if value is None:       # get
1528
2119
            self.enable()
1529
2120
        else:
1530
2121
            self.disable()
1531
 
    
 
2122
 
1532
2123
    # LastCheckedOK - property
1533
 
    @dbus_service_property(_interface, signature="s",
 
2124
    @dbus_service_property(_interface,
 
2125
                           signature="s",
1534
2126
                           access="readwrite")
1535
2127
    def LastCheckedOK_dbus_property(self, value=None):
1536
2128
        if value is not None:
1537
2129
            self.checked_ok()
1538
2130
            return
1539
2131
        return datetime_to_dbus(self.last_checked_ok)
1540
 
    
 
2132
 
1541
2133
    # LastCheckerStatus - property
1542
 
    @dbus_service_property(_interface, signature="n",
1543
 
                           access="read")
 
2134
    @dbus_service_property(_interface, signature="n", access="read")
1544
2135
    def LastCheckerStatus_dbus_property(self):
1545
2136
        return dbus.Int16(self.last_checker_status)
1546
 
    
 
2137
 
1547
2138
    # Expires - property
1548
2139
    @dbus_service_property(_interface, signature="s", access="read")
1549
2140
    def Expires_dbus_property(self):
1550
2141
        return datetime_to_dbus(self.expires)
1551
 
    
 
2142
 
1552
2143
    # LastApprovalRequest - property
1553
2144
    @dbus_service_property(_interface, signature="s", access="read")
1554
2145
    def LastApprovalRequest_dbus_property(self):
1555
2146
        return datetime_to_dbus(self.last_approval_request)
1556
 
    
 
2147
 
1557
2148
    # Timeout - property
1558
 
    @dbus_service_property(_interface, signature="t",
 
2149
    @dbus_service_property(_interface,
 
2150
                           signature="t",
1559
2151
                           access="readwrite")
1560
2152
    def Timeout_dbus_property(self, value=None):
1561
2153
        if value is None:       # get
1562
 
            return dbus.UInt64(self.timeout_milliseconds())
 
2154
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
1563
2155
        old_timeout = self.timeout
1564
2156
        self.timeout = datetime.timedelta(0, 0, 0, value)
1565
2157
        # Reschedule disabling
1573
2165
                if (getattr(self, "disable_initiator_tag", None)
1574
2166
                    is None):
1575
2167
                    return
1576
 
                gobject.source_remove(self.disable_initiator_tag)
1577
 
                self.disable_initiator_tag = (
1578
 
                    gobject.timeout_add(
1579
 
                        timedelta_to_milliseconds(self.expires - now),
1580
 
                        self.disable))
1581
 
    
 
2168
                GLib.source_remove(self.disable_initiator_tag)
 
2169
                self.disable_initiator_tag = GLib.timeout_add(
 
2170
                    int((self.expires - now).total_seconds() * 1000),
 
2171
                    self.disable)
 
2172
 
1582
2173
    # ExtendedTimeout - property
1583
 
    @dbus_service_property(_interface, signature="t",
 
2174
    @dbus_service_property(_interface,
 
2175
                           signature="t",
1584
2176
                           access="readwrite")
1585
2177
    def ExtendedTimeout_dbus_property(self, value=None):
1586
2178
        if value is None:       # get
1587
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
 
2179
            return dbus.UInt64(self.extended_timeout.total_seconds()
 
2180
                               * 1000)
1588
2181
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1589
 
    
 
2182
 
1590
2183
    # Interval - property
1591
 
    @dbus_service_property(_interface, signature="t",
 
2184
    @dbus_service_property(_interface,
 
2185
                           signature="t",
1592
2186
                           access="readwrite")
1593
2187
    def Interval_dbus_property(self, value=None):
1594
2188
        if value is None:       # get
1595
 
            return dbus.UInt64(self.interval_milliseconds())
 
2189
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1596
2190
        self.interval = datetime.timedelta(0, 0, 0, value)
1597
2191
        if getattr(self, "checker_initiator_tag", None) is None:
1598
2192
            return
1599
2193
        if self.enabled:
1600
2194
            # Reschedule checker run
1601
 
            gobject.source_remove(self.checker_initiator_tag)
1602
 
            self.checker_initiator_tag = (gobject.timeout_add
1603
 
                                          (value, self.start_checker))
1604
 
            self.start_checker()    # Start one now, too
1605
 
    
 
2195
            GLib.source_remove(self.checker_initiator_tag)
 
2196
            self.checker_initiator_tag = GLib.timeout_add(
 
2197
                value, self.start_checker)
 
2198
            self.start_checker()  # Start one now, too
 
2199
 
1606
2200
    # Checker - property
1607
 
    @dbus_service_property(_interface, signature="s",
 
2201
    @dbus_service_property(_interface,
 
2202
                           signature="s",
1608
2203
                           access="readwrite")
1609
2204
    def Checker_dbus_property(self, value=None):
1610
2205
        if value is None:       # get
1611
2206
            return dbus.String(self.checker_command)
1612
 
        self.checker_command = unicode(value)
1613
 
    
 
2207
        self.checker_command = str(value)
 
2208
 
1614
2209
    # CheckerRunning - property
1615
 
    @dbus_service_property(_interface, signature="b",
 
2210
    @dbus_service_property(_interface,
 
2211
                           signature="b",
1616
2212
                           access="readwrite")
1617
2213
    def CheckerRunning_dbus_property(self, value=None):
1618
2214
        if value is None:       # get
1621
2217
            self.start_checker()
1622
2218
        else:
1623
2219
            self.stop_checker()
1624
 
    
 
2220
 
1625
2221
    # ObjectPath - property
 
2222
    @dbus_annotations(
 
2223
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
 
2224
         "org.freedesktop.DBus.Deprecated": "true"})
1626
2225
    @dbus_service_property(_interface, signature="o", access="read")
1627
2226
    def ObjectPath_dbus_property(self):
1628
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1629
 
    
 
2227
        return self.dbus_object_path  # is already a dbus.ObjectPath
 
2228
 
1630
2229
    # Secret = property
1631
 
    @dbus_service_property(_interface, signature="ay",
1632
 
                           access="write", byte_arrays=True)
 
2230
    @dbus_annotations(
 
2231
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
 
2232
         "invalidates"})
 
2233
    @dbus_service_property(_interface,
 
2234
                           signature="ay",
 
2235
                           access="write",
 
2236
                           byte_arrays=True)
1633
2237
    def Secret_dbus_property(self, value):
1634
 
        self.secret = str(value)
1635
 
    
 
2238
        self.secret = bytes(value)
 
2239
 
1636
2240
    del _interface
1637
2241
 
1638
2242
 
1639
 
class ProxyClient(object):
1640
 
    def __init__(self, child_pipe, fpr, address):
 
2243
class ProxyClient:
 
2244
    def __init__(self, child_pipe, key_id, fpr, address):
1641
2245
        self._pipe = child_pipe
1642
 
        self._pipe.send(('init', fpr, address))
 
2246
        self._pipe.send(('init', key_id, fpr, address))
1643
2247
        if not self._pipe.recv():
1644
 
            raise KeyError()
1645
 
    
 
2248
            raise KeyError(key_id or fpr)
 
2249
 
1646
2250
    def __getattribute__(self, name):
1647
2251
        if name == '_pipe':
1648
2252
            return super(ProxyClient, self).__getattribute__(name)
1651
2255
        if data[0] == 'data':
1652
2256
            return data[1]
1653
2257
        if data[0] == 'function':
 
2258
 
1654
2259
            def func(*args, **kwargs):
1655
2260
                self._pipe.send(('funcall', name, args, kwargs))
1656
2261
                return self._pipe.recv()[1]
 
2262
 
1657
2263
            return func
1658
 
    
 
2264
 
1659
2265
    def __setattr__(self, name, value):
1660
2266
        if name == '_pipe':
1661
2267
            return super(ProxyClient, self).__setattr__(name, value)
1664
2270
 
1665
2271
class ClientHandler(socketserver.BaseRequestHandler, object):
1666
2272
    """A class to handle client connections.
1667
 
    
 
2273
 
1668
2274
    Instantiated once for each connection to handle it.
1669
2275
    Note: This will run in its own forked process."""
1670
 
    
 
2276
 
1671
2277
    def handle(self):
1672
2278
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1673
2279
            logger.info("TCP connection from: %s",
1674
 
                        unicode(self.client_address))
 
2280
                        str(self.client_address))
1675
2281
            logger.debug("Pipe FD: %d",
1676
2282
                         self.server.child_pipe.fileno())
1677
 
            
1678
 
            session = (gnutls.connection
1679
 
                       .ClientSession(self.request,
1680
 
                                      gnutls.connection
1681
 
                                      .X509Credentials()))
1682
 
            
1683
 
            # Note: gnutls.connection.X509Credentials is really a
1684
 
            # generic GnuTLS certificate credentials object so long as
1685
 
            # no X.509 keys are added to it.  Therefore, we can use it
1686
 
            # here despite using OpenPGP certificates.
1687
 
            
1688
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1689
 
            #                      "+AES-256-CBC", "+SHA1",
1690
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1691
 
            #                      "+DHE-DSS"))
 
2283
 
 
2284
            session = gnutls.ClientSession(self.request)
 
2285
 
 
2286
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
2287
            #                       "+AES-256-CBC", "+SHA1",
 
2288
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
 
2289
            #                       "+DHE-DSS"))
1692
2290
            # Use a fallback default, since this MUST be set.
1693
2291
            priority = self.server.gnutls_priority
1694
2292
            if priority is None:
1695
2293
                priority = "NORMAL"
1696
 
            (gnutls.library.functions
1697
 
             .gnutls_priority_set_direct(session._c_object,
1698
 
                                         priority, None))
1699
 
            
 
2294
            gnutls.priority_set_direct(session._c_object,
 
2295
                                       priority.encode("utf-8"),
 
2296
                                       None)
 
2297
 
1700
2298
            # Start communication using the Mandos protocol
1701
2299
            # Get protocol number
1702
2300
            line = self.request.makefile().readline()
1707
2305
            except (ValueError, IndexError, RuntimeError) as error:
1708
2306
                logger.error("Unknown protocol version: %s", error)
1709
2307
                return
1710
 
            
 
2308
 
1711
2309
            # Start GnuTLS connection
1712
2310
            try:
1713
2311
                session.handshake()
1714
 
            except gnutls.errors.GNUTLSError as error:
 
2312
            except gnutls.Error as error:
1715
2313
                logger.warning("Handshake failed: %s", error)
1716
2314
                # Do not run session.bye() here: the session is not
1717
2315
                # established.  Just abandon the request.
1718
2316
                return
1719
2317
            logger.debug("Handshake succeeded")
1720
 
            
 
2318
 
1721
2319
            approval_required = False
1722
2320
            try:
1723
 
                try:
1724
 
                    fpr = self.fingerprint(self.peer_certificate
1725
 
                                           (session))
1726
 
                except (TypeError,
1727
 
                        gnutls.errors.GNUTLSError) as error:
1728
 
                    logger.warning("Bad certificate: %s", error)
1729
 
                    return
1730
 
                logger.debug("Fingerprint: %s", fpr)
1731
 
                
1732
 
                try:
1733
 
                    client = ProxyClient(child_pipe, fpr,
 
2321
                if gnutls.has_rawpk:
 
2322
                    fpr = b""
 
2323
                    try:
 
2324
                        key_id = self.key_id(
 
2325
                            self.peer_certificate(session))
 
2326
                    except (TypeError, gnutls.Error) as error:
 
2327
                        logger.warning("Bad certificate: %s", error)
 
2328
                        return
 
2329
                    logger.debug("Key ID: %s", key_id)
 
2330
 
 
2331
                else:
 
2332
                    key_id = b""
 
2333
                    try:
 
2334
                        fpr = self.fingerprint(
 
2335
                            self.peer_certificate(session))
 
2336
                    except (TypeError, gnutls.Error) as error:
 
2337
                        logger.warning("Bad certificate: %s", error)
 
2338
                        return
 
2339
                    logger.debug("Fingerprint: %s", fpr)
 
2340
 
 
2341
                try:
 
2342
                    client = ProxyClient(child_pipe, key_id, fpr,
1734
2343
                                         self.client_address)
1735
2344
                except KeyError:
1736
2345
                    return
1737
 
                
 
2346
 
1738
2347
                if client.approval_delay:
1739
2348
                    delay = client.approval_delay
1740
2349
                    client.approvals_pending += 1
1741
2350
                    approval_required = True
1742
 
                
 
2351
 
1743
2352
                while True:
1744
2353
                    if not client.enabled:
1745
2354
                        logger.info("Client %s is disabled",
1746
 
                                       client.name)
 
2355
                                    client.name)
1747
2356
                        if self.server.use_dbus:
1748
2357
                            # Emit D-Bus signal
1749
2358
                            client.Rejected("Disabled")
1750
2359
                        return
1751
 
                    
 
2360
 
1752
2361
                    if client.approved or not client.approval_delay:
1753
 
                        #We are approved or approval is disabled
 
2362
                        # We are approved or approval is disabled
1754
2363
                        break
1755
2364
                    elif client.approved is None:
1756
2365
                        logger.info("Client %s needs approval",
1758
2367
                        if self.server.use_dbus:
1759
2368
                            # Emit D-Bus signal
1760
2369
                            client.NeedApproval(
1761
 
                                client.approval_delay_milliseconds(),
1762
 
                                client.approved_by_default)
 
2370
                                client.approval_delay.total_seconds()
 
2371
                                * 1000, client.approved_by_default)
1763
2372
                    else:
1764
2373
                        logger.warning("Client %s was not approved",
1765
2374
                                       client.name)
1767
2376
                            # Emit D-Bus signal
1768
2377
                            client.Rejected("Denied")
1769
2378
                        return
1770
 
                    
1771
 
                    #wait until timeout or approved
 
2379
 
 
2380
                    # wait until timeout or approved
1772
2381
                    time = datetime.datetime.now()
1773
2382
                    client.changedstate.acquire()
1774
 
                    client.changedstate.wait(
1775
 
                        float(timedelta_to_milliseconds(delay)
1776
 
                              / 1000))
 
2383
                    client.changedstate.wait(delay.total_seconds())
1777
2384
                    client.changedstate.release()
1778
2385
                    time2 = datetime.datetime.now()
1779
2386
                    if (time2 - time) >= delay:
1789
2396
                            break
1790
2397
                    else:
1791
2398
                        delay -= time2 - time
1792
 
                
1793
 
                sent_size = 0
1794
 
                while sent_size < len(client.secret):
1795
 
                    try:
1796
 
                        sent = session.send(client.secret[sent_size:])
1797
 
                    except gnutls.errors.GNUTLSError as error:
1798
 
                        logger.warning("gnutls send failed",
1799
 
                                       exc_info=error)
1800
 
                        return
1801
 
                    logger.debug("Sent: %d, remaining: %d",
1802
 
                                 sent, len(client.secret)
1803
 
                                 - (sent_size + sent))
1804
 
                    sent_size += sent
1805
 
                
 
2399
 
 
2400
                try:
 
2401
                    session.send(client.secret)
 
2402
                except gnutls.Error as error:
 
2403
                    logger.warning("gnutls send failed",
 
2404
                                   exc_info=error)
 
2405
                    return
 
2406
 
1806
2407
                logger.info("Sending secret to %s", client.name)
1807
2408
                # bump the timeout using extended_timeout
1808
2409
                client.bump_timeout(client.extended_timeout)
1809
2410
                if self.server.use_dbus:
1810
2411
                    # Emit D-Bus signal
1811
2412
                    client.GotSecret()
1812
 
            
 
2413
 
1813
2414
            finally:
1814
2415
                if approval_required:
1815
2416
                    client.approvals_pending -= 1
1816
2417
                try:
1817
2418
                    session.bye()
1818
 
                except gnutls.errors.GNUTLSError as error:
 
2419
                except gnutls.Error as error:
1819
2420
                    logger.warning("GnuTLS bye failed",
1820
2421
                                   exc_info=error)
1821
 
    
 
2422
 
1822
2423
    @staticmethod
1823
2424
    def peer_certificate(session):
1824
 
        "Return the peer's OpenPGP certificate as a bytestring"
1825
 
        # If not an OpenPGP certificate...
1826
 
        if (gnutls.library.functions
1827
 
            .gnutls_certificate_type_get(session._c_object)
1828
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1829
 
            # ...do the normal thing
1830
 
            return session.peer_certificate
 
2425
        "Return the peer's certificate as a bytestring"
 
2426
        try:
 
2427
            cert_type = gnutls.certificate_type_get2(session._c_object,
 
2428
                                                     gnutls.CTYPE_PEERS)
 
2429
        except AttributeError:
 
2430
            cert_type = gnutls.certificate_type_get(session._c_object)
 
2431
        if gnutls.has_rawpk:
 
2432
            valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
 
2433
        else:
 
2434
            valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
 
2435
        # If not a valid certificate type...
 
2436
        if cert_type not in valid_cert_types:
 
2437
            logger.info("Cert type %r not in %r", cert_type,
 
2438
                        valid_cert_types)
 
2439
            # ...return invalid data
 
2440
            return b""
1831
2441
        list_size = ctypes.c_uint(1)
1832
 
        cert_list = (gnutls.library.functions
1833
 
                     .gnutls_certificate_get_peers
 
2442
        cert_list = (gnutls.certificate_get_peers
1834
2443
                     (session._c_object, ctypes.byref(list_size)))
1835
2444
        if not bool(cert_list) and list_size.value != 0:
1836
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1837
 
                                            " certificate")
 
2445
            raise gnutls.Error("error getting peer certificate")
1838
2446
        if list_size.value == 0:
1839
2447
            return None
1840
2448
        cert = cert_list[0]
1841
2449
        return ctypes.string_at(cert.data, cert.size)
1842
 
    
 
2450
 
 
2451
    @staticmethod
 
2452
    def key_id(certificate):
 
2453
        "Convert a certificate bytestring to a hexdigit key ID"
 
2454
        # New GnuTLS "datum" with the public key
 
2455
        datum = gnutls.datum_t(
 
2456
            ctypes.cast(ctypes.c_char_p(certificate),
 
2457
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2458
            ctypes.c_uint(len(certificate)))
 
2459
        # XXX all these need to be created in the gnutls "module"
 
2460
        # New empty GnuTLS certificate
 
2461
        pubkey = gnutls.pubkey_t()
 
2462
        gnutls.pubkey_init(ctypes.byref(pubkey))
 
2463
        # Import the raw public key into the certificate
 
2464
        gnutls.pubkey_import(pubkey,
 
2465
                             ctypes.byref(datum),
 
2466
                             gnutls.X509_FMT_DER)
 
2467
        # New buffer for the key ID
 
2468
        buf = ctypes.create_string_buffer(32)
 
2469
        buf_len = ctypes.c_size_t(len(buf))
 
2470
        # Get the key ID from the raw public key into the buffer
 
2471
        gnutls.pubkey_get_key_id(pubkey,
 
2472
                                 gnutls.KEYID_USE_SHA256,
 
2473
                                 ctypes.cast(ctypes.byref(buf),
 
2474
                                             ctypes.POINTER(ctypes.c_ubyte)),
 
2475
                                 ctypes.byref(buf_len))
 
2476
        # Deinit the certificate
 
2477
        gnutls.pubkey_deinit(pubkey)
 
2478
 
 
2479
        # Convert the buffer to a Python bytestring
 
2480
        key_id = ctypes.string_at(buf, buf_len.value)
 
2481
        # Convert the bytestring to hexadecimal notation
 
2482
        hex_key_id = binascii.hexlify(key_id).upper()
 
2483
        return hex_key_id
 
2484
 
1843
2485
    @staticmethod
1844
2486
    def fingerprint(openpgp):
1845
2487
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1846
2488
        # New GnuTLS "datum" with the OpenPGP public key
1847
 
        datum = (gnutls.library.types
1848
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1849
 
                                             ctypes.POINTER
1850
 
                                             (ctypes.c_ubyte)),
1851
 
                                 ctypes.c_uint(len(openpgp))))
 
2489
        datum = gnutls.datum_t(
 
2490
            ctypes.cast(ctypes.c_char_p(openpgp),
 
2491
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2492
            ctypes.c_uint(len(openpgp)))
1852
2493
        # New empty GnuTLS certificate
1853
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1854
 
        (gnutls.library.functions
1855
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
2494
        crt = gnutls.openpgp_crt_t()
 
2495
        gnutls.openpgp_crt_init(ctypes.byref(crt))
1856
2496
        # Import the OpenPGP public key into the certificate
1857
 
        (gnutls.library.functions
1858
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1859
 
                                    gnutls.library.constants
1860
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
2497
        gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
 
2498
                                  gnutls.OPENPGP_FMT_RAW)
1861
2499
        # Verify the self signature in the key
1862
2500
        crtverify = ctypes.c_uint()
1863
 
        (gnutls.library.functions
1864
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1865
 
                                         ctypes.byref(crtverify)))
 
2501
        gnutls.openpgp_crt_verify_self(crt, 0,
 
2502
                                       ctypes.byref(crtverify))
1866
2503
        if crtverify.value != 0:
1867
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1868
 
            raise (gnutls.errors.CertificateSecurityError
1869
 
                   ("Verify failed"))
 
2504
            gnutls.openpgp_crt_deinit(crt)
 
2505
            raise gnutls.CertificateSecurityError(code
 
2506
                                                  =crtverify.value)
1870
2507
        # New buffer for the fingerprint
1871
2508
        buf = ctypes.create_string_buffer(20)
1872
2509
        buf_len = ctypes.c_size_t()
1873
2510
        # Get the fingerprint from the certificate into the buffer
1874
 
        (gnutls.library.functions
1875
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1876
 
                                             ctypes.byref(buf_len)))
 
2511
        gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
2512
                                           ctypes.byref(buf_len))
1877
2513
        # Deinit the certificate
1878
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
2514
        gnutls.openpgp_crt_deinit(crt)
1879
2515
        # Convert the buffer to a Python bytestring
1880
2516
        fpr = ctypes.string_at(buf, buf_len.value)
1881
2517
        # Convert the bytestring to hexadecimal notation
1883
2519
        return hex_fpr
1884
2520
 
1885
2521
 
1886
 
class MultiprocessingMixIn(object):
 
2522
class MultiprocessingMixIn:
1887
2523
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
2524
 
1888
2525
    def sub_process_main(self, request, address):
1889
2526
        try:
1890
2527
            self.finish_request(request, address)
1891
2528
        except Exception:
1892
2529
            self.handle_error(request, address)
1893
2530
        self.close_request(request)
1894
 
    
 
2531
 
1895
2532
    def process_request(self, request, address):
1896
2533
        """Start a new process to process the request."""
1897
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1898
 
                                       args = (request, address))
 
2534
        proc = multiprocessing.Process(target=self.sub_process_main,
 
2535
                                       args=(request, address))
1899
2536
        proc.start()
1900
2537
        return proc
1901
2538
 
1902
2539
 
1903
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
 
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1904
2541
    """ adds a pipe to the MixIn """
 
2542
 
1905
2543
    def process_request(self, request, client_address):
1906
2544
        """Overrides and wraps the original process_request().
1907
 
        
 
2545
 
1908
2546
        This function creates a new pipe in self.pipe
1909
2547
        """
1910
2548
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1911
 
        
 
2549
 
1912
2550
        proc = MultiprocessingMixIn.process_request(self, request,
1913
2551
                                                    client_address)
1914
2552
        self.child_pipe.close()
1915
2553
        self.add_pipe(parent_pipe, proc)
1916
 
    
 
2554
 
1917
2555
    def add_pipe(self, parent_pipe, proc):
1918
2556
        """Dummy function; override as necessary"""
1919
2557
        raise NotImplementedError()
1920
2558
 
1921
2559
 
1922
2560
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1923
 
                     socketserver.TCPServer, object):
 
2561
                     socketserver.TCPServer):
1924
2562
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1925
 
    
 
2563
 
1926
2564
    Attributes:
1927
2565
        enabled:        Boolean; whether this server is activated yet
1928
2566
        interface:      None or a network interface name (string)
1929
2567
        use_ipv6:       Boolean; to use IPv6 or not
1930
2568
    """
 
2569
 
1931
2570
    def __init__(self, server_address, RequestHandlerClass,
1932
 
                 interface=None, use_ipv6=True, socketfd=None):
 
2571
                 interface=None,
 
2572
                 use_ipv6=True,
 
2573
                 socketfd=None):
1933
2574
        """If socketfd is set, use that file descriptor instead of
1934
2575
        creating a new one with socket.socket().
1935
2576
        """
1941
2582
            self.socketfd = socketfd
1942
2583
            # Save the original socket.socket() function
1943
2584
            self.socket_socket = socket.socket
 
2585
 
1944
2586
            # To implement --socket, we monkey patch socket.socket.
1945
 
            # 
 
2587
            #
1946
2588
            # (When socketserver.TCPServer is a new-style class, we
1947
2589
            # could make self.socket into a property instead of monkey
1948
2590
            # patching socket.socket.)
1949
 
            # 
 
2591
            #
1950
2592
            # Create a one-time-only replacement for socket.socket()
1951
2593
            @functools.wraps(socket.socket)
1952
2594
            def socket_wrapper(*args, **kwargs):
1964
2606
        # socket_wrapper(), if socketfd was set.
1965
2607
        socketserver.TCPServer.__init__(self, server_address,
1966
2608
                                        RequestHandlerClass)
1967
 
    
 
2609
 
1968
2610
    def server_bind(self):
1969
2611
        """This overrides the normal server_bind() function
1970
2612
        to bind to an interface if one was specified, and also NOT to
1971
2613
        bind to an address or port if they were not specified."""
 
2614
        global SO_BINDTODEVICE
1972
2615
        if self.interface is not None:
1973
2616
            if SO_BINDTODEVICE is None:
1974
 
                logger.error("SO_BINDTODEVICE does not exist;"
1975
 
                             " cannot bind to interface %s",
1976
 
                             self.interface)
1977
 
            else:
1978
 
                try:
1979
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1980
 
                                           SO_BINDTODEVICE,
1981
 
                                           str(self.interface + '\0'))
1982
 
                except socket.error as error:
1983
 
                    if error.errno == errno.EPERM:
1984
 
                        logger.error("No permission to bind to"
1985
 
                                     " interface %s", self.interface)
1986
 
                    elif error.errno == errno.ENOPROTOOPT:
1987
 
                        logger.error("SO_BINDTODEVICE not available;"
1988
 
                                     " cannot bind to interface %s",
1989
 
                                     self.interface)
1990
 
                    elif error.errno == errno.ENODEV:
1991
 
                        logger.error("Interface %s does not exist,"
1992
 
                                     " cannot bind", self.interface)
1993
 
                    else:
1994
 
                        raise
 
2617
                # Fall back to a hard-coded value which seems to be
 
2618
                # common enough.
 
2619
                logger.warning("SO_BINDTODEVICE not found, trying 25")
 
2620
                SO_BINDTODEVICE = 25
 
2621
            try:
 
2622
                self.socket.setsockopt(
 
2623
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
 
2624
                    (self.interface + "\0").encode("utf-8"))
 
2625
            except socket.error as error:
 
2626
                if error.errno == errno.EPERM:
 
2627
                    logger.error("No permission to bind to"
 
2628
                                 " interface %s", self.interface)
 
2629
                elif error.errno == errno.ENOPROTOOPT:
 
2630
                    logger.error("SO_BINDTODEVICE not available;"
 
2631
                                 " cannot bind to interface %s",
 
2632
                                 self.interface)
 
2633
                elif error.errno == errno.ENODEV:
 
2634
                    logger.error("Interface %s does not exist,"
 
2635
                                 " cannot bind", self.interface)
 
2636
                else:
 
2637
                    raise
1995
2638
        # Only bind(2) the socket if we really need to.
1996
2639
        if self.server_address[0] or self.server_address[1]:
 
2640
            if self.server_address[1]:
 
2641
                self.allow_reuse_address = True
1997
2642
            if not self.server_address[0]:
1998
2643
                if self.address_family == socket.AF_INET6:
1999
 
                    any_address = "::" # in6addr_any
 
2644
                    any_address = "::"  # in6addr_any
2000
2645
                else:
2001
 
                    any_address = "0.0.0.0" # INADDR_ANY
 
2646
                    any_address = "0.0.0.0"  # INADDR_ANY
2002
2647
                self.server_address = (any_address,
2003
2648
                                       self.server_address[1])
2004
2649
            elif not self.server_address[1]:
2005
 
                self.server_address = (self.server_address[0],
2006
 
                                       0)
 
2650
                self.server_address = (self.server_address[0], 0)
2007
2651
#                 if self.interface:
2008
2652
#                     self.server_address = (self.server_address[0],
2009
2653
#                                            0, # port
2015
2659
 
2016
2660
class MandosServer(IPv6_TCPServer):
2017
2661
    """Mandos server.
2018
 
    
 
2662
 
2019
2663
    Attributes:
2020
2664
        clients:        set of Client objects
2021
2665
        gnutls_priority GnuTLS priority string
2022
2666
        use_dbus:       Boolean; to emit D-Bus signals or not
2023
 
    
2024
 
    Assumes a gobject.MainLoop event loop.
 
2667
 
 
2668
    Assumes a GLib.MainLoop event loop.
2025
2669
    """
 
2670
 
2026
2671
    def __init__(self, server_address, RequestHandlerClass,
2027
 
                 interface=None, use_ipv6=True, clients=None,
2028
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
 
2672
                 interface=None,
 
2673
                 use_ipv6=True,
 
2674
                 clients=None,
 
2675
                 gnutls_priority=None,
 
2676
                 use_dbus=True,
 
2677
                 socketfd=None):
2029
2678
        self.enabled = False
2030
2679
        self.clients = clients
2031
2680
        if self.clients is None:
2034
2683
        self.gnutls_priority = gnutls_priority
2035
2684
        IPv6_TCPServer.__init__(self, server_address,
2036
2685
                                RequestHandlerClass,
2037
 
                                interface = interface,
2038
 
                                use_ipv6 = use_ipv6,
2039
 
                                socketfd = socketfd)
 
2686
                                interface=interface,
 
2687
                                use_ipv6=use_ipv6,
 
2688
                                socketfd=socketfd)
 
2689
 
2040
2690
    def server_activate(self):
2041
2691
        if self.enabled:
2042
2692
            return socketserver.TCPServer.server_activate(self)
2043
 
    
 
2693
 
2044
2694
    def enable(self):
2045
2695
        self.enabled = True
2046
 
    
 
2696
 
2047
2697
    def add_pipe(self, parent_pipe, proc):
2048
2698
        # Call "handle_ipc" for both data and EOF events
2049
 
        gobject.io_add_watch(parent_pipe.fileno(),
2050
 
                             gobject.IO_IN | gobject.IO_HUP,
2051
 
                             functools.partial(self.handle_ipc,
2052
 
                                               parent_pipe =
2053
 
                                               parent_pipe,
2054
 
                                               proc = proc))
2055
 
    
2056
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2057
 
                   proc = None, client_object=None):
 
2699
        GLib.io_add_watch(
 
2700
            GLib.IOChannel.unix_new(parent_pipe.fileno()),
 
2701
            GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
 
2702
            functools.partial(self.handle_ipc,
 
2703
                              parent_pipe=parent_pipe,
 
2704
                              proc=proc))
 
2705
 
 
2706
    def handle_ipc(self, source, condition,
 
2707
                   parent_pipe=None,
 
2708
                   proc=None,
 
2709
                   client_object=None):
2058
2710
        # error, or the other end of multiprocessing.Pipe has closed
2059
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
 
2711
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
2060
2712
            # Wait for other process to exit
2061
2713
            proc.join()
2062
2714
            return False
2063
 
        
 
2715
 
2064
2716
        # Read a request from the child
2065
2717
        request = parent_pipe.recv()
2066
2718
        command = request[0]
2067
 
        
 
2719
 
2068
2720
        if command == 'init':
2069
 
            fpr = request[1]
2070
 
            address = request[2]
2071
 
            
2072
 
            for c in self.clients.itervalues():
2073
 
                if c.fingerprint == fpr:
 
2721
            key_id = request[1].decode("ascii")
 
2722
            fpr = request[2].decode("ascii")
 
2723
            address = request[3]
 
2724
 
 
2725
            for c in self.clients.values():
 
2726
                if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
 
2727
                    continue
 
2728
                if key_id and c.key_id == key_id:
 
2729
                    client = c
 
2730
                    break
 
2731
                if fpr and c.fingerprint == fpr:
2074
2732
                    client = c
2075
2733
                    break
2076
2734
            else:
2077
 
                logger.info("Client not found for fingerprint: %s, ad"
2078
 
                            "dress: %s", fpr, address)
 
2735
                logger.info("Client not found for key ID: %s, address"
 
2736
                            ": %s", key_id or fpr, address)
2079
2737
                if self.use_dbus:
2080
2738
                    # Emit D-Bus signal
2081
 
                    mandos_dbus_service.ClientNotFound(fpr,
 
2739
                    mandos_dbus_service.ClientNotFound(key_id or fpr,
2082
2740
                                                       address[0])
2083
2741
                parent_pipe.send(False)
2084
2742
                return False
2085
 
            
2086
 
            gobject.io_add_watch(parent_pipe.fileno(),
2087
 
                                 gobject.IO_IN | gobject.IO_HUP,
2088
 
                                 functools.partial(self.handle_ipc,
2089
 
                                                   parent_pipe =
2090
 
                                                   parent_pipe,
2091
 
                                                   proc = proc,
2092
 
                                                   client_object =
2093
 
                                                   client))
 
2743
 
 
2744
            GLib.io_add_watch(
 
2745
                GLib.IOChannel.unix_new(parent_pipe.fileno()),
 
2746
                GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
 
2747
                functools.partial(self.handle_ipc,
 
2748
                                  parent_pipe=parent_pipe,
 
2749
                                  proc=proc,
 
2750
                                  client_object=client))
2094
2751
            parent_pipe.send(True)
2095
2752
            # remove the old hook in favor of the new above hook on
2096
2753
            # same fileno
2099
2756
            funcname = request[1]
2100
2757
            args = request[2]
2101
2758
            kwargs = request[3]
2102
 
            
 
2759
 
2103
2760
            parent_pipe.send(('data', getattr(client_object,
2104
2761
                                              funcname)(*args,
2105
 
                                                         **kwargs)))
2106
 
        
 
2762
                                                        **kwargs)))
 
2763
 
2107
2764
        if command == 'getattr':
2108
2765
            attrname = request[1]
2109
 
            if callable(client_object.__getattribute__(attrname)):
2110
 
                parent_pipe.send(('function',))
 
2766
            if isinstance(client_object.__getattribute__(attrname),
 
2767
                          collections.abc.Callable):
 
2768
                parent_pipe.send(('function', ))
2111
2769
            else:
2112
 
                parent_pipe.send(('data', client_object
2113
 
                                  .__getattribute__(attrname)))
2114
 
        
 
2770
                parent_pipe.send((
 
2771
                    'data', client_object.__getattribute__(attrname)))
 
2772
 
2115
2773
        if command == 'setattr':
2116
2774
            attrname = request[1]
2117
2775
            value = request[2]
2118
2776
            setattr(client_object, attrname, value)
2119
 
        
 
2777
 
2120
2778
        return True
2121
2779
 
2122
2780
 
2123
2781
def rfc3339_duration_to_delta(duration):
2124
2782
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2125
 
    
2126
 
    >>> rfc3339_duration_to_delta("P7D")
2127
 
    datetime.timedelta(7)
2128
 
    >>> rfc3339_duration_to_delta("PT60S")
2129
 
    datetime.timedelta(0, 60)
2130
 
    >>> rfc3339_duration_to_delta("PT60M")
2131
 
    datetime.timedelta(0, 3600)
2132
 
    >>> rfc3339_duration_to_delta("PT24H")
2133
 
    datetime.timedelta(1)
2134
 
    >>> rfc3339_duration_to_delta("P1W")
2135
 
    datetime.timedelta(7)
2136
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2137
 
    datetime.timedelta(0, 330)
2138
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2139
 
    datetime.timedelta(1, 200)
 
2783
 
 
2784
    >>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
 
2785
    True
 
2786
    >>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
 
2787
    True
 
2788
    >>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
 
2789
    True
 
2790
    >>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
 
2791
    True
 
2792
    >>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
 
2793
    True
 
2794
    >>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
 
2795
    True
 
2796
    >>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
 
2797
    True
2140
2798
    """
2141
 
    
 
2799
 
2142
2800
    # Parsing an RFC 3339 duration with regular expressions is not
2143
2801
    # possible - there would have to be multiple places for the same
2144
2802
    # values, like seconds.  The current code, while more esoteric, is
2145
2803
    # cleaner without depending on a parsing library.  If Python had a
2146
2804
    # built-in library for parsing we would use it, but we'd like to
2147
2805
    # avoid excessive use of external libraries.
2148
 
    
 
2806
 
2149
2807
    # New type for defining tokens, syntax, and semantics all-in-one
2150
 
    Token = collections.namedtuple("Token",
2151
 
                                   ("regexp", # To match token; if
2152
 
                                              # "value" is not None,
2153
 
                                              # must have a "group"
2154
 
                                              # containing digits
2155
 
                                    "value",  # datetime.timedelta or
2156
 
                                              # None
2157
 
                                    "followers")) # Tokens valid after
2158
 
                                                  # this token
 
2808
    Token = collections.namedtuple("Token", (
 
2809
        "regexp",  # To match token; if "value" is not None, must have
 
2810
                   # a "group" containing digits
 
2811
        "value",   # datetime.timedelta or None
 
2812
        "followers"))           # Tokens valid after this token
2159
2813
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2160
2814
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2161
2815
    token_end = Token(re.compile(r"$"), None, frozenset())
2162
2816
    token_second = Token(re.compile(r"(\d+)S"),
2163
2817
                         datetime.timedelta(seconds=1),
2164
 
                         frozenset((token_end,)))
 
2818
                         frozenset((token_end, )))
2165
2819
    token_minute = Token(re.compile(r"(\d+)M"),
2166
2820
                         datetime.timedelta(minutes=1),
2167
2821
                         frozenset((token_second, token_end)))
2183
2837
                       frozenset((token_month, token_end)))
2184
2838
    token_week = Token(re.compile(r"(\d+)W"),
2185
2839
                       datetime.timedelta(weeks=1),
2186
 
                       frozenset((token_end,)))
 
2840
                       frozenset((token_end, )))
2187
2841
    token_duration = Token(re.compile(r"P"), None,
2188
2842
                           frozenset((token_year, token_month,
2189
2843
                                      token_day, token_time,
2190
 
                                      token_week))),
2191
 
    # Define starting values
2192
 
    value = datetime.timedelta() # Value so far
 
2844
                                      token_week)))
 
2845
    # Define starting values:
 
2846
    # Value so far
 
2847
    value = datetime.timedelta()
2193
2848
    found_token = None
2194
 
    followers = frozenset(token_duration,) # Following valid tokens
2195
 
    s = duration                # String left to parse
 
2849
    # Following valid tokens
 
2850
    followers = frozenset((token_duration, ))
 
2851
    # String left to parse
 
2852
    s = duration
2196
2853
    # Loop until end token is found
2197
2854
    while found_token is not token_end:
2198
2855
        # Search for any currently valid tokens
2214
2871
                break
2215
2872
        else:
2216
2873
            # No currently valid tokens were found
2217
 
            raise ValueError("Invalid RFC 3339 duration")
 
2874
            raise ValueError("Invalid RFC 3339 duration: {!r}"
 
2875
                             .format(duration))
2218
2876
    # End token found
2219
2877
    return value
2220
2878
 
2221
2879
 
2222
2880
def string_to_delta(interval):
2223
2881
    """Parse a string and return a datetime.timedelta
2224
 
    
2225
 
    >>> string_to_delta('7d')
2226
 
    datetime.timedelta(7)
2227
 
    >>> string_to_delta('60s')
2228
 
    datetime.timedelta(0, 60)
2229
 
    >>> string_to_delta('60m')
2230
 
    datetime.timedelta(0, 3600)
2231
 
    >>> string_to_delta('24h')
2232
 
    datetime.timedelta(1)
2233
 
    >>> string_to_delta('1w')
2234
 
    datetime.timedelta(7)
2235
 
    >>> string_to_delta('5m 30s')
2236
 
    datetime.timedelta(0, 330)
 
2882
 
 
2883
    >>> string_to_delta('7d') == datetime.timedelta(7)
 
2884
    True
 
2885
    >>> string_to_delta('60s') == datetime.timedelta(0, 60)
 
2886
    True
 
2887
    >>> string_to_delta('60m') == datetime.timedelta(0, 3600)
 
2888
    True
 
2889
    >>> string_to_delta('24h') == datetime.timedelta(1)
 
2890
    True
 
2891
    >>> string_to_delta('1w') == datetime.timedelta(7)
 
2892
    True
 
2893
    >>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
 
2894
    True
2237
2895
    """
2238
 
    
 
2896
 
2239
2897
    try:
2240
2898
        return rfc3339_duration_to_delta(interval)
2241
2899
    except ValueError:
2242
2900
        pass
2243
 
    
 
2901
 
2244
2902
    timevalue = datetime.timedelta(0)
2245
2903
    for s in interval.split():
2246
2904
        try:
2247
 
            suffix = unicode(s[-1])
 
2905
            suffix = s[-1]
2248
2906
            value = int(s[:-1])
2249
2907
            if suffix == "d":
2250
2908
                delta = datetime.timedelta(value)
2257
2915
            elif suffix == "w":
2258
2916
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2259
2917
            else:
2260
 
                raise ValueError("Unknown suffix {0!r}"
2261
 
                                 .format(suffix))
 
2918
                raise ValueError("Unknown suffix {!r}".format(suffix))
2262
2919
        except IndexError as e:
2263
2920
            raise ValueError(*(e.args))
2264
2921
        timevalue += delta
2265
2922
    return timevalue
2266
2923
 
2267
2924
 
2268
 
def daemon(nochdir = False, noclose = False):
 
2925
def daemon(nochdir=False, noclose=False):
2269
2926
    """See daemon(3).  Standard BSD Unix function.
2270
 
    
 
2927
 
2271
2928
    This should really exist as os.daemon, but it doesn't (yet)."""
2272
2929
    if os.fork():
2273
2930
        sys.exit()
2281
2938
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2282
2939
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2283
2940
            raise OSError(errno.ENODEV,
2284
 
                          "{0} not a character device"
 
2941
                          "{} not a character device"
2285
2942
                          .format(os.devnull))
2286
2943
        os.dup2(null, sys.stdin.fileno())
2287
2944
        os.dup2(null, sys.stdout.fileno())
2291
2948
 
2292
2949
 
2293
2950
def main():
2294
 
    
 
2951
 
2295
2952
    ##################################################################
2296
2953
    # Parsing of options, both command line and config file
2297
 
    
 
2954
 
2298
2955
    parser = argparse.ArgumentParser()
2299
2956
    parser.add_argument("-v", "--version", action="version",
2300
 
                        version = "%(prog)s {0}".format(version),
 
2957
                        version="%(prog)s {}".format(version),
2301
2958
                        help="show version number and exit")
2302
2959
    parser.add_argument("-i", "--interface", metavar="IF",
2303
2960
                        help="Bind to interface IF")
2336
2993
                        help="Directory to save/restore state in")
2337
2994
    parser.add_argument("--foreground", action="store_true",
2338
2995
                        help="Run in foreground", default=None)
2339
 
    
 
2996
    parser.add_argument("--no-zeroconf", action="store_false",
 
2997
                        dest="zeroconf", help="Do not use Zeroconf",
 
2998
                        default=None)
 
2999
 
2340
3000
    options = parser.parse_args()
2341
 
    
2342
 
    if options.check:
2343
 
        import doctest
2344
 
        fail_count, test_count = doctest.testmod()
2345
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2346
 
    
 
3001
 
2347
3002
    # Default values for config file for server-global settings
2348
 
    server_defaults = { "interface": "",
2349
 
                        "address": "",
2350
 
                        "port": "",
2351
 
                        "debug": "False",
2352
 
                        "priority":
2353
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2354
 
                        "servicename": "Mandos",
2355
 
                        "use_dbus": "True",
2356
 
                        "use_ipv6": "True",
2357
 
                        "debuglevel": "",
2358
 
                        "restore": "True",
2359
 
                        "socket": "",
2360
 
                        "statedir": "/var/lib/mandos",
2361
 
                        "foreground": "False",
2362
 
                        }
2363
 
    
 
3003
    if gnutls.has_rawpk:
 
3004
        priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
 
3005
                    ":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
 
3006
    else:
 
3007
        priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
3008
                    ":+SIGN-DSA-SHA256")
 
3009
    server_defaults = {"interface": "",
 
3010
                       "address": "",
 
3011
                       "port": "",
 
3012
                       "debug": "False",
 
3013
                       "priority": priority,
 
3014
                       "servicename": "Mandos",
 
3015
                       "use_dbus": "True",
 
3016
                       "use_ipv6": "True",
 
3017
                       "debuglevel": "",
 
3018
                       "restore": "True",
 
3019
                       "socket": "",
 
3020
                       "statedir": "/var/lib/mandos",
 
3021
                       "foreground": "False",
 
3022
                       "zeroconf": "True",
 
3023
                       }
 
3024
    del priority
 
3025
 
2364
3026
    # Parse config file for server-global settings
2365
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
3027
    server_config = configparser.ConfigParser(server_defaults)
2366
3028
    del server_defaults
2367
 
    server_config.read(os.path.join(options.configdir,
2368
 
                                    "mandos.conf"))
2369
 
    # Convert the SafeConfigParser object to a dict
 
3029
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
3030
    # Convert the ConfigParser object to a dict
2370
3031
    server_settings = server_config.defaults()
2371
3032
    # Use the appropriate methods on the non-string config options
2372
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
 
3033
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
3034
                   "foreground", "zeroconf"):
2373
3035
        server_settings[option] = server_config.getboolean("DEFAULT",
2374
3036
                                                           option)
2375
3037
    if server_settings["port"]:
2385
3047
            server_settings["socket"] = os.dup(server_settings
2386
3048
                                               ["socket"])
2387
3049
    del server_config
2388
 
    
 
3050
 
2389
3051
    # Override the settings from the config file with command line
2390
3052
    # options, if set.
2391
3053
    for option in ("interface", "address", "port", "debug",
2392
 
                   "priority", "servicename", "configdir",
2393
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2394
 
                   "statedir", "socket", "foreground"):
 
3054
                   "priority", "servicename", "configdir", "use_dbus",
 
3055
                   "use_ipv6", "debuglevel", "restore", "statedir",
 
3056
                   "socket", "foreground", "zeroconf"):
2395
3057
        value = getattr(options, option)
2396
3058
        if value is not None:
2397
3059
            server_settings[option] = value
2398
3060
    del options
2399
3061
    # Force all strings to be unicode
2400
3062
    for option in server_settings.keys():
2401
 
        if type(server_settings[option]) is str:
2402
 
            server_settings[option] = unicode(server_settings[option])
 
3063
        if isinstance(server_settings[option], bytes):
 
3064
            server_settings[option] = (server_settings[option]
 
3065
                                       .decode("utf-8"))
2403
3066
    # Force all boolean options to be boolean
2404
3067
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2405
 
                   "foreground"):
 
3068
                   "foreground", "zeroconf"):
2406
3069
        server_settings[option] = bool(server_settings[option])
2407
3070
    # Debug implies foreground
2408
3071
    if server_settings["debug"]:
2409
3072
        server_settings["foreground"] = True
2410
3073
    # Now we have our good server settings in "server_settings"
2411
 
    
 
3074
 
2412
3075
    ##################################################################
2413
 
    
 
3076
 
 
3077
    if (not server_settings["zeroconf"]
 
3078
        and not (server_settings["port"]
 
3079
                 or server_settings["socket"] != "")):
 
3080
        parser.error("Needs port or socket to work without Zeroconf")
 
3081
 
2414
3082
    # For convenience
2415
3083
    debug = server_settings["debug"]
2416
3084
    debuglevel = server_settings["debuglevel"]
2419
3087
    stored_state_path = os.path.join(server_settings["statedir"],
2420
3088
                                     stored_state_file)
2421
3089
    foreground = server_settings["foreground"]
2422
 
    
 
3090
    zeroconf = server_settings["zeroconf"]
 
3091
 
2423
3092
    if debug:
2424
3093
        initlogger(debug, logging.DEBUG)
2425
3094
    else:
2428
3097
        else:
2429
3098
            level = getattr(logging, debuglevel.upper())
2430
3099
            initlogger(debug, level)
2431
 
    
 
3100
 
2432
3101
    if server_settings["servicename"] != "Mandos":
2433
 
        syslogger.setFormatter(logging.Formatter
2434
 
                               ('Mandos ({0}) [%(process)d]:'
2435
 
                                ' %(levelname)s: %(message)s'
2436
 
                                .format(server_settings
2437
 
                                        ["servicename"])))
2438
 
    
 
3102
        syslogger.setFormatter(
 
3103
            logging.Formatter('Mandos ({}) [%(process)d]:'
 
3104
                              ' %(levelname)s: %(message)s'.format(
 
3105
                                  server_settings["servicename"])))
 
3106
 
2439
3107
    # Parse config file with clients
2440
 
    client_config = configparser.SafeConfigParser(Client
2441
 
                                                  .client_defaults)
 
3108
    client_config = configparser.ConfigParser(Client.client_defaults)
2442
3109
    client_config.read(os.path.join(server_settings["configdir"],
2443
3110
                                    "clients.conf"))
2444
 
    
 
3111
 
2445
3112
    global mandos_dbus_service
2446
3113
    mandos_dbus_service = None
2447
 
    
2448
 
    tcp_server = MandosServer((server_settings["address"],
2449
 
                               server_settings["port"]),
2450
 
                              ClientHandler,
2451
 
                              interface=(server_settings["interface"]
2452
 
                                         or None),
2453
 
                              use_ipv6=use_ipv6,
2454
 
                              gnutls_priority=
2455
 
                              server_settings["priority"],
2456
 
                              use_dbus=use_dbus,
2457
 
                              socketfd=(server_settings["socket"]
2458
 
                                        or None))
 
3114
 
 
3115
    socketfd = None
 
3116
    if server_settings["socket"] != "":
 
3117
        socketfd = server_settings["socket"]
 
3118
    tcp_server = MandosServer(
 
3119
        (server_settings["address"], server_settings["port"]),
 
3120
        ClientHandler,
 
3121
        interface=(server_settings["interface"] or None),
 
3122
        use_ipv6=use_ipv6,
 
3123
        gnutls_priority=server_settings["priority"],
 
3124
        use_dbus=use_dbus,
 
3125
        socketfd=socketfd)
2459
3126
    if not foreground:
2460
3127
        pidfilename = "/run/mandos.pid"
2461
3128
        if not os.path.isdir("/run/."):
2462
3129
            pidfilename = "/var/run/mandos.pid"
2463
3130
        pidfile = None
2464
3131
        try:
2465
 
            pidfile = open(pidfilename, "w")
 
3132
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2466
3133
        except IOError as e:
2467
3134
            logger.error("Could not open file %r", pidfilename,
2468
3135
                         exc_info=e)
2469
 
    
2470
 
    for name in ("_mandos", "mandos", "nobody"):
 
3136
 
 
3137
    for name, group in (("_mandos", "_mandos"),
 
3138
                        ("mandos", "mandos"),
 
3139
                        ("nobody", "nogroup")):
2471
3140
        try:
2472
3141
            uid = pwd.getpwnam(name).pw_uid
2473
 
            gid = pwd.getpwnam(name).pw_gid
 
3142
            gid = pwd.getpwnam(group).pw_gid
2474
3143
            break
2475
3144
        except KeyError:
2476
3145
            continue
2480
3149
    try:
2481
3150
        os.setgid(gid)
2482
3151
        os.setuid(uid)
 
3152
        if debug:
 
3153
            logger.debug("Did setuid/setgid to {}:{}".format(uid,
 
3154
                                                             gid))
2483
3155
    except OSError as error:
 
3156
        logger.warning("Failed to setuid/setgid to {}:{}: {}"
 
3157
                       .format(uid, gid, os.strerror(error.errno)))
2484
3158
        if error.errno != errno.EPERM:
2485
3159
            raise
2486
 
    
 
3160
 
2487
3161
    if debug:
2488
3162
        # Enable all possible GnuTLS debugging
2489
 
        
 
3163
 
2490
3164
        # "Use a log level over 10 to enable all debugging options."
2491
3165
        # - GnuTLS manual
2492
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2493
 
        
2494
 
        @gnutls.library.types.gnutls_log_func
 
3166
        gnutls.global_set_log_level(11)
 
3167
 
 
3168
        @gnutls.log_func
2495
3169
        def debug_gnutls(level, string):
2496
3170
            logger.debug("GnuTLS: %s", string[:-1])
2497
 
        
2498
 
        (gnutls.library.functions
2499
 
         .gnutls_global_set_log_function(debug_gnutls))
2500
 
        
 
3171
 
 
3172
        gnutls.global_set_log_function(debug_gnutls)
 
3173
 
2501
3174
        # Redirect stdin so all checkers get /dev/null
2502
3175
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2503
3176
        os.dup2(null, sys.stdin.fileno())
2504
3177
        if null > 2:
2505
3178
            os.close(null)
2506
 
    
 
3179
 
2507
3180
    # Need to fork before connecting to D-Bus
2508
3181
    if not foreground:
2509
3182
        # Close all input and output, do double fork, etc.
2510
3183
        daemon()
2511
 
    
2512
 
    # multiprocessing will use threads, so before we use gobject we
2513
 
    # need to inform gobject that threads will be used.
2514
 
    gobject.threads_init()
2515
 
    
 
3184
 
 
3185
    if gi.version_info < (3, 10, 2):
 
3186
        # multiprocessing will use threads, so before we use GLib we
 
3187
        # need to inform GLib that threads will be used.
 
3188
        GLib.threads_init()
 
3189
 
2516
3190
    global main_loop
2517
3191
    # From the Avahi example code
2518
3192
    DBusGMainLoop(set_as_default=True)
2519
 
    main_loop = gobject.MainLoop()
 
3193
    main_loop = GLib.MainLoop()
2520
3194
    bus = dbus.SystemBus()
2521
3195
    # End of Avahi example code
2522
3196
    if use_dbus:
2523
3197
        try:
2524
3198
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2525
 
                                            bus, do_not_queue=True)
2526
 
            old_bus_name = (dbus.service.BusName
2527
 
                            ("se.bsnet.fukt.Mandos", bus,
2528
 
                             do_not_queue=True))
2529
 
        except dbus.exceptions.NameExistsException as e:
 
3199
                                            bus,
 
3200
                                            do_not_queue=True)
 
3201
            old_bus_name = dbus.service.BusName(
 
3202
                "se.bsnet.fukt.Mandos", bus,
 
3203
                do_not_queue=True)
 
3204
        except dbus.exceptions.DBusException as e:
2530
3205
            logger.error("Disabling D-Bus:", exc_info=e)
2531
3206
            use_dbus = False
2532
3207
            server_settings["use_dbus"] = False
2533
3208
            tcp_server.use_dbus = False
2534
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2535
 
    service = AvahiServiceToSyslog(name =
2536
 
                                   server_settings["servicename"],
2537
 
                                   servicetype = "_mandos._tcp",
2538
 
                                   protocol = protocol, bus = bus)
2539
 
    if server_settings["interface"]:
2540
 
        service.interface = (if_nametoindex
2541
 
                             (str(server_settings["interface"])))
2542
 
    
 
3209
    if zeroconf:
 
3210
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
3211
        service = AvahiServiceToSyslog(
 
3212
            name=server_settings["servicename"],
 
3213
            servicetype="_mandos._tcp",
 
3214
            protocol=protocol,
 
3215
            bus=bus)
 
3216
        if server_settings["interface"]:
 
3217
            service.interface = if_nametoindex(
 
3218
                server_settings["interface"].encode("utf-8"))
 
3219
 
2543
3220
    global multiprocessing_manager
2544
3221
    multiprocessing_manager = multiprocessing.Manager()
2545
 
    
 
3222
 
2546
3223
    client_class = Client
2547
3224
    if use_dbus:
2548
 
        client_class = functools.partial(ClientDBus, bus = bus)
2549
 
    
 
3225
        client_class = functools.partial(ClientDBus, bus=bus)
 
3226
 
2550
3227
    client_settings = Client.config_parser(client_config)
2551
3228
    old_client_settings = {}
2552
3229
    clients_data = {}
2553
 
    
 
3230
 
2554
3231
    # This is used to redirect stdout and stderr for checker processes
2555
3232
    global wnull
2556
 
    wnull = open(os.devnull, "w") # A writable /dev/null
 
3233
    wnull = open(os.devnull, "w")  # A writable /dev/null
2557
3234
    # Only used if server is running in foreground but not in debug
2558
3235
    # mode
2559
3236
    if debug or not foreground:
2560
3237
        wnull.close()
2561
 
    
 
3238
 
2562
3239
    # Get client data and settings from last running state.
2563
3240
    if server_settings["restore"]:
2564
3241
        try:
2565
3242
            with open(stored_state_path, "rb") as stored_state:
2566
 
                clients_data, old_client_settings = (pickle.load
2567
 
                                                     (stored_state))
 
3243
                if sys.version_info.major == 2:
 
3244
                    clients_data, old_client_settings = pickle.load(
 
3245
                        stored_state)
 
3246
                else:
 
3247
                    bytes_clients_data, bytes_old_client_settings = (
 
3248
                        pickle.load(stored_state, encoding="bytes"))
 
3249
                    #   Fix bytes to strings
 
3250
                    #  clients_data
 
3251
                    # .keys()
 
3252
                    clients_data = {(key.decode("utf-8")
 
3253
                                     if isinstance(key, bytes)
 
3254
                                     else key): value
 
3255
                                    for key, value in
 
3256
                                    bytes_clients_data.items()}
 
3257
                    del bytes_clients_data
 
3258
                    for key in clients_data:
 
3259
                        value = {(k.decode("utf-8")
 
3260
                                  if isinstance(k, bytes) else k): v
 
3261
                                 for k, v in
 
3262
                                 clients_data[key].items()}
 
3263
                        clients_data[key] = value
 
3264
                        # .client_structure
 
3265
                        value["client_structure"] = [
 
3266
                            (s.decode("utf-8")
 
3267
                             if isinstance(s, bytes)
 
3268
                             else s) for s in
 
3269
                            value["client_structure"]]
 
3270
                        # .name, .host, and .checker_command
 
3271
                        for k in ("name", "host", "checker_command"):
 
3272
                            if isinstance(value[k], bytes):
 
3273
                                value[k] = value[k].decode("utf-8")
 
3274
                        if "key_id" not in value:
 
3275
                            value["key_id"] = ""
 
3276
                        elif "fingerprint" not in value:
 
3277
                            value["fingerprint"] = ""
 
3278
                    #  old_client_settings
 
3279
                    # .keys()
 
3280
                    old_client_settings = {
 
3281
                        (key.decode("utf-8")
 
3282
                         if isinstance(key, bytes)
 
3283
                         else key): value
 
3284
                        for key, value in
 
3285
                        bytes_old_client_settings.items()}
 
3286
                    del bytes_old_client_settings
 
3287
                    # .host and .checker_command
 
3288
                    for value in old_client_settings.values():
 
3289
                        for attribute in ("host", "checker_command"):
 
3290
                            if isinstance(value[attribute], bytes):
 
3291
                                value[attribute] = (value[attribute]
 
3292
                                                    .decode("utf-8"))
2568
3293
            os.remove(stored_state_path)
2569
3294
        except IOError as e:
2570
3295
            if e.errno == errno.ENOENT:
2571
 
                logger.warning("Could not load persistent state: {0}"
2572
 
                                .format(os.strerror(e.errno)))
 
3296
                logger.warning("Could not load persistent state:"
 
3297
                               " {}".format(os.strerror(e.errno)))
2573
3298
            else:
2574
3299
                logger.critical("Could not load persistent state:",
2575
3300
                                exc_info=e)
2576
3301
                raise
2577
3302
        except EOFError as e:
2578
3303
            logger.warning("Could not load persistent state: "
2579
 
                           "EOFError:", exc_info=e)
2580
 
    
 
3304
                           "EOFError:",
 
3305
                           exc_info=e)
 
3306
 
2581
3307
    with PGPEngine() as pgp:
2582
 
        for client_name, client in clients_data.iteritems():
 
3308
        for client_name, client in clients_data.items():
2583
3309
            # Skip removed clients
2584
3310
            if client_name not in client_settings:
2585
3311
                continue
2586
 
            
 
3312
 
2587
3313
            # Decide which value to use after restoring saved state.
2588
3314
            # We have three different values: Old config file,
2589
3315
            # new config file, and saved state.
2594
3320
                    # For each value in new config, check if it
2595
3321
                    # differs from the old config value (Except for
2596
3322
                    # the "secret" attribute)
2597
 
                    if (name != "secret" and
2598
 
                        value != old_client_settings[client_name]
2599
 
                        [name]):
 
3323
                    if (name != "secret"
 
3324
                        and (value !=
 
3325
                             old_client_settings[client_name][name])):
2600
3326
                        client[name] = value
2601
3327
                except KeyError:
2602
3328
                    pass
2603
 
            
 
3329
 
2604
3330
            # Clients who has passed its expire date can still be
2605
 
            # enabled if its last checker was successful.  Clients
 
3331
            # enabled if its last checker was successful.  A Client
2606
3332
            # whose checker succeeded before we stored its state is
2607
3333
            # assumed to have successfully run all checkers during
2608
3334
            # downtime.
2610
3336
                if datetime.datetime.utcnow() >= client["expires"]:
2611
3337
                    if not client["last_checked_ok"]:
2612
3338
                        logger.warning(
2613
 
                            "disabling client {0} - Client never "
2614
 
                            "performed a successful checker"
2615
 
                            .format(client_name))
 
3339
                            "disabling client {} - Client never "
 
3340
                            "performed a successful checker".format(
 
3341
                                client_name))
2616
3342
                        client["enabled"] = False
2617
3343
                    elif client["last_checker_status"] != 0:
2618
3344
                        logger.warning(
2619
 
                            "disabling client {0} - Client "
2620
 
                            "last checker failed with error code {1}"
2621
 
                            .format(client_name,
2622
 
                                    client["last_checker_status"]))
 
3345
                            "disabling client {} - Client last"
 
3346
                            " checker failed with error code"
 
3347
                            " {}".format(
 
3348
                                client_name,
 
3349
                                client["last_checker_status"]))
2623
3350
                        client["enabled"] = False
2624
3351
                    else:
2625
 
                        client["expires"] = (datetime.datetime
2626
 
                                             .utcnow()
2627
 
                                             + client["timeout"])
 
3352
                        client["expires"] = (
 
3353
                            datetime.datetime.utcnow()
 
3354
                            + client["timeout"])
2628
3355
                        logger.debug("Last checker succeeded,"
2629
 
                                     " keeping {0} enabled"
2630
 
                                     .format(client_name))
 
3356
                                     " keeping {} enabled".format(
 
3357
                                         client_name))
2631
3358
            try:
2632
 
                client["secret"] = (
2633
 
                    pgp.decrypt(client["encrypted_secret"],
2634
 
                                client_settings[client_name]
2635
 
                                ["secret"]))
 
3359
                client["secret"] = pgp.decrypt(
 
3360
                    client["encrypted_secret"],
 
3361
                    client_settings[client_name]["secret"])
2636
3362
            except PGPError:
2637
3363
                # If decryption fails, we use secret from new settings
2638
 
                logger.debug("Failed to decrypt {0} old secret"
2639
 
                             .format(client_name))
2640
 
                client["secret"] = (
2641
 
                    client_settings[client_name]["secret"])
2642
 
    
 
3364
                logger.debug("Failed to decrypt {} old secret".format(
 
3365
                    client_name))
 
3366
                client["secret"] = (client_settings[client_name]
 
3367
                                    ["secret"])
 
3368
 
2643
3369
    # Add/remove clients based on new changes made to config
2644
3370
    for client_name in (set(old_client_settings)
2645
3371
                        - set(client_settings)):
2647
3373
    for client_name in (set(client_settings)
2648
3374
                        - set(old_client_settings)):
2649
3375
        clients_data[client_name] = client_settings[client_name]
2650
 
    
 
3376
 
2651
3377
    # Create all client objects
2652
 
    for client_name, client in clients_data.iteritems():
 
3378
    for client_name, client in clients_data.items():
2653
3379
        tcp_server.clients[client_name] = client_class(
2654
 
            name = client_name, settings = client,
2655
 
            server_settings = server_settings)
2656
 
    
 
3380
            name=client_name,
 
3381
            settings=client,
 
3382
            server_settings=server_settings)
 
3383
 
2657
3384
    if not tcp_server.clients:
2658
3385
        logger.warning("No clients defined")
2659
 
    
 
3386
 
2660
3387
    if not foreground:
2661
3388
        if pidfile is not None:
 
3389
            pid = os.getpid()
2662
3390
            try:
2663
3391
                with pidfile:
2664
 
                    pid = os.getpid()
2665
 
                    pidfile.write(str(pid) + "\n".encode("utf-8"))
 
3392
                    print(pid, file=pidfile)
2666
3393
            except IOError:
2667
3394
                logger.error("Could not write to file %r with PID %d",
2668
3395
                             pidfilename, pid)
2669
3396
        del pidfile
2670
3397
        del pidfilename
2671
 
    
2672
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2673
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2674
 
    
 
3398
 
 
3399
    for termsig in (signal.SIGHUP, signal.SIGTERM):
 
3400
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
 
3401
                             lambda: main_loop.quit() and False)
 
3402
 
2675
3403
    if use_dbus:
2676
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2677
 
                                        "se.bsnet.fukt.Mandos"})
2678
 
        class MandosDBusService(DBusObjectWithProperties):
 
3404
 
 
3405
        @alternate_dbus_interfaces(
 
3406
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
 
3407
        class MandosDBusService(DBusObjectWithObjectManager):
2679
3408
            """A D-Bus proxy object"""
 
3409
 
2680
3410
            def __init__(self):
2681
3411
                dbus.service.Object.__init__(self, bus, "/")
 
3412
 
2682
3413
            _interface = "se.recompile.Mandos"
2683
 
            
2684
 
            @dbus_interface_annotations(_interface)
2685
 
            def _foo(self):
2686
 
                return { "org.freedesktop.DBus.Property"
2687
 
                         ".EmitsChangedSignal":
2688
 
                             "false"}
2689
 
            
 
3414
 
2690
3415
            @dbus.service.signal(_interface, signature="o")
2691
3416
            def ClientAdded(self, objpath):
2692
3417
                "D-Bus signal"
2693
3418
                pass
2694
 
            
 
3419
 
2695
3420
            @dbus.service.signal(_interface, signature="ss")
2696
 
            def ClientNotFound(self, fingerprint, address):
 
3421
            def ClientNotFound(self, key_id, address):
2697
3422
                "D-Bus signal"
2698
3423
                pass
2699
 
            
 
3424
 
 
3425
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3426
                               "true"})
2700
3427
            @dbus.service.signal(_interface, signature="os")
2701
3428
            def ClientRemoved(self, objpath, name):
2702
3429
                "D-Bus signal"
2703
3430
                pass
2704
 
            
 
3431
 
 
3432
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3433
                               "true"})
2705
3434
            @dbus.service.method(_interface, out_signature="ao")
2706
3435
            def GetAllClients(self):
2707
3436
                "D-Bus method"
2708
 
                return dbus.Array(c.dbus_object_path
2709
 
                                  for c in
2710
 
                                  tcp_server.clients.itervalues())
2711
 
            
 
3437
                return dbus.Array(c.dbus_object_path for c in
 
3438
                                  tcp_server.clients.values())
 
3439
 
 
3440
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3441
                               "true"})
2712
3442
            @dbus.service.method(_interface,
2713
3443
                                 out_signature="a{oa{sv}}")
2714
3444
            def GetAllClientsWithProperties(self):
2715
3445
                "D-Bus method"
2716
3446
                return dbus.Dictionary(
2717
 
                    ((c.dbus_object_path, c.GetAll(""))
2718
 
                     for c in tcp_server.clients.itervalues()),
 
3447
                    {c.dbus_object_path: c.GetAll(
 
3448
                        "se.recompile.Mandos.Client")
 
3449
                     for c in tcp_server.clients.values()},
2719
3450
                    signature="oa{sv}")
2720
 
            
 
3451
 
2721
3452
            @dbus.service.method(_interface, in_signature="o")
2722
3453
            def RemoveClient(self, object_path):
2723
3454
                "D-Bus method"
2724
 
                for c in tcp_server.clients.itervalues():
 
3455
                for c in tcp_server.clients.values():
2725
3456
                    if c.dbus_object_path == object_path:
2726
3457
                        del tcp_server.clients[c.name]
2727
3458
                        c.remove_from_connection()
2728
 
                        # Don't signal anything except ClientRemoved
 
3459
                        # Don't signal the disabling
2729
3460
                        c.disable(quiet=True)
2730
 
                        # Emit D-Bus signal
2731
 
                        self.ClientRemoved(object_path, c.name)
 
3461
                        # Emit D-Bus signal for removal
 
3462
                        self.client_removed_signal(c)
2732
3463
                        return
2733
3464
                raise KeyError(object_path)
2734
 
            
 
3465
 
2735
3466
            del _interface
2736
 
        
 
3467
 
 
3468
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
3469
                                 out_signature="a{oa{sa{sv}}}")
 
3470
            def GetManagedObjects(self):
 
3471
                """D-Bus method"""
 
3472
                return dbus.Dictionary(
 
3473
                    {client.dbus_object_path:
 
3474
                     dbus.Dictionary(
 
3475
                         {interface: client.GetAll(interface)
 
3476
                          for interface in
 
3477
                          client._get_all_interface_names()})
 
3478
                     for client in tcp_server.clients.values()})
 
3479
 
 
3480
            def client_added_signal(self, client):
 
3481
                """Send the new standard signal and the old signal"""
 
3482
                if use_dbus:
 
3483
                    # New standard signal
 
3484
                    self.InterfacesAdded(
 
3485
                        client.dbus_object_path,
 
3486
                        dbus.Dictionary(
 
3487
                            {interface: client.GetAll(interface)
 
3488
                             for interface in
 
3489
                             client._get_all_interface_names()}))
 
3490
                    # Old signal
 
3491
                    self.ClientAdded(client.dbus_object_path)
 
3492
 
 
3493
            def client_removed_signal(self, client):
 
3494
                """Send the new standard signal and the old signal"""
 
3495
                if use_dbus:
 
3496
                    # New standard signal
 
3497
                    self.InterfacesRemoved(
 
3498
                        client.dbus_object_path,
 
3499
                        client._get_all_interface_names())
 
3500
                    # Old signal
 
3501
                    self.ClientRemoved(client.dbus_object_path,
 
3502
                                       client.name)
 
3503
 
2737
3504
        mandos_dbus_service = MandosDBusService()
2738
 
    
 
3505
 
 
3506
    # Save modules to variables to exempt the modules from being
 
3507
    # unloaded before the function registered with atexit() is run.
 
3508
    mp = multiprocessing
 
3509
    wn = wnull
 
3510
 
2739
3511
    def cleanup():
2740
3512
        "Cleanup function; run on exit"
2741
 
        service.cleanup()
2742
 
        
2743
 
        multiprocessing.active_children()
2744
 
        wnull.close()
 
3513
        if zeroconf:
 
3514
            service.cleanup()
 
3515
 
 
3516
        mp.active_children()
 
3517
        wn.close()
2745
3518
        if not (tcp_server.clients or client_settings):
2746
3519
            return
2747
 
        
 
3520
 
2748
3521
        # Store client before exiting. Secrets are encrypted with key
2749
3522
        # based on what config file has. If config file is
2750
3523
        # removed/edited, old secret will thus be unrecovable.
2751
3524
        clients = {}
2752
3525
        with PGPEngine() as pgp:
2753
 
            for client in tcp_server.clients.itervalues():
 
3526
            for client in tcp_server.clients.values():
2754
3527
                key = client_settings[client.name]["secret"]
2755
3528
                client.encrypted_secret = pgp.encrypt(client.secret,
2756
3529
                                                      key)
2757
3530
                client_dict = {}
2758
 
                
 
3531
 
2759
3532
                # A list of attributes that can not be pickled
2760
3533
                # + secret.
2761
 
                exclude = set(("bus", "changedstate", "secret",
2762
 
                               "checker", "server_settings"))
2763
 
                for name, typ in (inspect.getmembers
2764
 
                                  (dbus.service.Object)):
 
3534
                exclude = {"bus", "changedstate", "secret",
 
3535
                           "checker", "server_settings"}
 
3536
                for name, typ in inspect.getmembers(dbus.service
 
3537
                                                    .Object):
2765
3538
                    exclude.add(name)
2766
 
                
 
3539
 
2767
3540
                client_dict["encrypted_secret"] = (client
2768
3541
                                                   .encrypted_secret)
2769
3542
                for attr in client.client_structure:
2770
3543
                    if attr not in exclude:
2771
3544
                        client_dict[attr] = getattr(client, attr)
2772
 
                
 
3545
 
2773
3546
                clients[client.name] = client_dict
2774
3547
                del client_settings[client.name]["secret"]
2775
 
        
 
3548
 
2776
3549
        try:
2777
 
            with (tempfile.NamedTemporaryFile
2778
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2779
 
                   dir=os.path.dirname(stored_state_path),
2780
 
                   delete=False)) as stored_state:
2781
 
                pickle.dump((clients, client_settings), stored_state)
2782
 
                tempname=stored_state.name
 
3550
            with tempfile.NamedTemporaryFile(
 
3551
                    mode='wb',
 
3552
                    suffix=".pickle",
 
3553
                    prefix='clients-',
 
3554
                    dir=os.path.dirname(stored_state_path),
 
3555
                    delete=False) as stored_state:
 
3556
                pickle.dump((clients, client_settings), stored_state,
 
3557
                            protocol=2)
 
3558
                tempname = stored_state.name
2783
3559
            os.rename(tempname, stored_state_path)
2784
3560
        except (IOError, OSError) as e:
2785
3561
            if not debug:
2788
3564
                except NameError:
2789
3565
                    pass
2790
3566
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2791
 
                logger.warning("Could not save persistent state: {0}"
 
3567
                logger.warning("Could not save persistent state: {}"
2792
3568
                               .format(os.strerror(e.errno)))
2793
3569
            else:
2794
3570
                logger.warning("Could not save persistent state:",
2795
3571
                               exc_info=e)
2796
3572
                raise
2797
 
        
 
3573
 
2798
3574
        # Delete all clients, and settings from config
2799
3575
        while tcp_server.clients:
2800
3576
            name, client = tcp_server.clients.popitem()
2801
3577
            if use_dbus:
2802
3578
                client.remove_from_connection()
2803
 
            # Don't signal anything except ClientRemoved
 
3579
            # Don't signal the disabling
2804
3580
            client.disable(quiet=True)
 
3581
            # Emit D-Bus signal for removal
2805
3582
            if use_dbus:
2806
 
                # Emit D-Bus signal
2807
 
                mandos_dbus_service.ClientRemoved(client
2808
 
                                                  .dbus_object_path,
2809
 
                                                  client.name)
 
3583
                mandos_dbus_service.client_removed_signal(client)
2810
3584
        client_settings.clear()
2811
 
    
 
3585
 
2812
3586
    atexit.register(cleanup)
2813
 
    
2814
 
    for client in tcp_server.clients.itervalues():
 
3587
 
 
3588
    for client in tcp_server.clients.values():
2815
3589
        if use_dbus:
2816
 
            # Emit D-Bus signal
2817
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
3590
            # Emit D-Bus signal for adding
 
3591
            mandos_dbus_service.client_added_signal(client)
2818
3592
        # Need to initiate checking of clients
2819
3593
        if client.enabled:
2820
3594
            client.init_checker()
2821
 
    
 
3595
 
2822
3596
    tcp_server.enable()
2823
3597
    tcp_server.server_activate()
2824
 
    
 
3598
 
2825
3599
    # Find out what port we got
2826
 
    service.port = tcp_server.socket.getsockname()[1]
 
3600
    if zeroconf:
 
3601
        service.port = tcp_server.socket.getsockname()[1]
2827
3602
    if use_ipv6:
2828
3603
        logger.info("Now listening on address %r, port %d,"
2829
3604
                    " flowinfo %d, scope_id %d",
2831
3606
    else:                       # IPv4
2832
3607
        logger.info("Now listening on address %r, port %d",
2833
3608
                    *tcp_server.socket.getsockname())
2834
 
    
2835
 
    #service.interface = tcp_server.socket.getsockname()[3]
2836
 
    
 
3609
 
 
3610
    # service.interface = tcp_server.socket.getsockname()[3]
 
3611
 
2837
3612
    try:
2838
 
        # From the Avahi example code
2839
 
        try:
2840
 
            service.activate()
2841
 
        except dbus.exceptions.DBusException as error:
2842
 
            logger.critical("D-Bus Exception", exc_info=error)
2843
 
            cleanup()
2844
 
            sys.exit(1)
2845
 
        # End of Avahi example code
2846
 
        
2847
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2848
 
                             lambda *args, **kwargs:
2849
 
                             (tcp_server.handle_request
2850
 
                              (*args[2:], **kwargs) or True))
2851
 
        
 
3613
        if zeroconf:
 
3614
            # From the Avahi example code
 
3615
            try:
 
3616
                service.activate()
 
3617
            except dbus.exceptions.DBusException as error:
 
3618
                logger.critical("D-Bus Exception", exc_info=error)
 
3619
                cleanup()
 
3620
                sys.exit(1)
 
3621
            # End of Avahi example code
 
3622
 
 
3623
        GLib.io_add_watch(
 
3624
            GLib.IOChannel.unix_new(tcp_server.fileno()),
 
3625
            GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
3626
            lambda *args, **kwargs: (tcp_server.handle_request
 
3627
                                     (*args[2:], **kwargs) or True))
 
3628
 
2852
3629
        logger.debug("Starting main loop")
2853
3630
        main_loop.run()
2854
3631
    except AvahiError as error:
2863
3640
    # Must run before the D-Bus bus name gets deregistered
2864
3641
    cleanup()
2865
3642
 
 
3643
 
 
3644
def should_only_run_tests():
 
3645
    parser = argparse.ArgumentParser(add_help=False)
 
3646
    parser.add_argument("--check", action='store_true')
 
3647
    args, unknown_args = parser.parse_known_args()
 
3648
    run_tests = args.check
 
3649
    if run_tests:
 
3650
        # Remove --check argument from sys.argv
 
3651
        sys.argv[1:] = unknown_args
 
3652
    return run_tests
 
3653
 
 
3654
# Add all tests from doctest strings
 
3655
def load_tests(loader, tests, none):
 
3656
    import doctest
 
3657
    tests.addTests(doctest.DocTestSuite())
 
3658
    return tests
 
3659
 
2866
3660
if __name__ == '__main__':
2867
 
    main()
 
3661
    try:
 
3662
        if should_only_run_tests():
 
3663
            # Call using ./mandos --check [--verbose]
 
3664
            unittest.main()
 
3665
        else:
 
3666
            main()
 
3667
    finally:
 
3668
        logging.shutdown()